Vox AC80/100 (early AC100) serial number 173


April - September 2019

16th September

Vox Teen Beat magazine, vol. 2, no. 1, late 1966. Below a picture of the store front of the Jenkins Music Company, Kansas City, Missouri :

On the far right, near the top: posters of the Beatles at the Washington Coliseum in 1964. The same picture was used for Thomas Organ Vox adverts in Downbeat magazine.

At the foot of the display, a set of Thomas Organ Vox dealer pictures:

Left to right: Gerry and the Pacemakers; The Beatles; Billy J. Kramer and the Dakotas; The Dave Clark Five; and The Animals.

Left to right: Dino, Desi and Billy; The Rolling Stones; and Paul Revere and the Raiders.

Sets of dealer pictures were circulated by Thomas Organ from late 1964. One can see sections of them in the picture of the stand set up by Bill Harris Music at the Disc Jockey Carnival, Los Angeles County Fair, Pomona, 25th-31st December 1964 - .

Some sets sent out in 1965 and 1966 contained pictures of The Hollies, The Standells, The Sir Douglas Quintet, and The MC5 (not included here).

Vox dealer pictures
Vox dealer pictures

Thomas Organ Vox "King of the Beat" catalogue from mid 1965. At least eight of the pictures were circulated as dealer photos.

15th September (3)

A piece on the Yardbirds from the "Spirit Lake Beacon", 18th August, 1966. Although one cannot be sure, it may be that Thomas Organ sought out English-made equipment for the band:

15th September (2)

Vox Teen Beat magazine, volume II, no. 2, from 1967 (page 22 to come). Two further issues will be added soon.

Page 10. The Yardbirds - the picture from a concert in California, early 1966, possibly the Hullabaloo Club in LA.

15th September

A couple of notes really on things USA. The "Vox Rules" badge (button) is well known in blue. It is also pictured in red on the front of Vox Teen Beat magazine vol. 2, issue 3, from 1967:

Vox Rules badge, Thomas Organ, 1967

Vox Teen Beat magazine vol. 2, issue 3

The second is a report of US Vox dealers visiting Europe in August 1967. One of their stops was the British Musical Instrument Industries fair in London, where they will have seen the new JMI solid state range - the report from Billboard magazine is . Thanks to Ihor for the reference.

31st August

A small diversion: an original cover for a Vox AC10 Super Reverb Twin head (trapezoid). Very few of these things around. It was used to cover AC100 serial number 241 from around 1990. Inside and outside are good and clean - no tears.

Dimensions are 10" tall, 10" deep. 25" along the lower front edge; 22 1/2" across the top.

If anyone knows of an amp with which this cover could be paired, do let me know.

27th August (3)

"Beat Instrumental" magazine, July 1969 - a great advert for "Jennings Electronic Developments" rotary speaker cabinets and the J100 combo. "Jennings Electronic Developments" became "Jennings Electronic Industries" a month or so later.

"Beat Instrumental" magazine, July 1969.

At the beginning of the year, "Beat Instrumental" published a short note - certain JEI items to be sold after November 1st as "Rotosound" products:

"Beat Instrumental" magazine, January 1969.

Two of those items were advertised in "Melody Maker" magazine in late November and early December 1969, the drawings simply taken over from JEI (note the grille cloth), though large "Rotosound" badges were of course added:

"Melody Maker" magazine, November 15th, 1969, repeated 13th December.

The Tympano and Tamborino were indeed JEI specials: - a second stream of advertising (and sales) must have seemed desirable for these rather esoteric inventions:

Page from a Jennings brochure, late 1969 or early 1970.

27th August (2)

"Beat Instrumental" magazine, June 1968: - a list of events for which "Jennings Musical Industries" - still "Jennings" - provided equipment despite being in receivership. Reg Clark, in an article published in August '68, gave the impression that he was highly tickled by this.

"Beat Instrumental" magazine, June 1968.

A large amount of equipment was evidently out on loan in May:

NME Poll Winners Concert: 12th May. See the picture below.

Aretha Franklin, Finsbury Park, Astoria: 11th May.

Aretha Franklin, Hammersmith Odeon: 12th May.

Johnny Cash: 4th - 19th May.

Gene Pitney: 5th April - 7th May.

The Symbols: currently unknown.

NME Poll Winners, 12th May, 1968. The 'two 12" and two 10" cabinets' noted in the article are actually Vox UL760 cabs, four of which can be seen above.

27th August

Some pics of the interior of the now added at the foot of the new page, and a correction: the Selmer shop was at 114-116 Charing Cross Road, not 104 as originally stated.

26th August

A new page begun on the at 100 Charing Cross Road. Below, an advert placed by the occupant of the third floor of the building. Height a specified requirement.

The Jennings Shop, 100 Charing Cross Road

"The Stage", 27th August, 1964.

25th August

Below, pictures of AC100 serial number 2111, probably produced in the second third of 1967, with a "Vox Sound Equipment Limited" Super Foundation Bass cab (1 x 18", ported), second half of 1968.

It is not known at present whether the AC100 conforms to schematic OS/036 or OS/167. See for the two sheets in question.

24th August

A Foundation Bass cab with its Fane 188 18" speaker. Fanes were used for a short time in 1966.

Model No. 188. Flux Density: 14,500 Gauss. Power Handling: 60 Watts. Impedance: 15 ohms. Serial No. 41020.

A Fane catalogue from the 1960s. Model 188 was evidently a derivative of Model 183.

22nd August

An interesting Vox poster: The Beatles at Shea in August 1966. Its date is unknown - could be late 60s or from the 1990s. "Vox Musical Instruments" seems more in keeping with the 60s, but one never knows.

Measures 17 1/2" x 22 1/2"

20th August

The other solid state Super Beatle amplifier used by the Beatles (unlikely to be the one auctioned in Phoenix) was exhibited in October 1966 in Indianapolis, not Chicago as stated yesterday, by "Carnegie Music", a major Vox dealer:

"Indianapolis Star", 22nd October, 1966.

"Indianapolis Star", 29th October, 1966.

"Indianapolis Star", 31st July, 1966, reporting that Carnegie Music bought up everything that Vox had shown at the NAMM Show in Chicago a fortnight earlier. It was presumably because of this that the amp used by The Beatles was brought along by Marv Kaiser.

Below, "Arizona Republic", 3rd November, 1966 - notice of the presence of the Super Beatle signalled in the advert in yesterday's post.

"Arizona Republic", 3rd November, 1966. Not a little confusingly, the drawing of the Vox AC100 is here captioned as a "Super Beatle" - a name it only had briefly in 1965.

Quite how many solid state Super Beatles the Beatles played through on the 1966 tour of the USA is at present unknown - clearly at least three, and possibly a good many more if one allows for failures and a constant refreshing of units by Thomas Organ as the band travelled around the country.

20th August

"Arizona Republic", 23rd December, 1966. One of the solid state Thomas Organ Super Beatle amps used by Paul McCartney on the 1966 USA tour auctioned:

"Arizona Republic", 23rd December, 1966. In spite of the fact that a solid state amp was being sold, still the old drawing of the Vox AC100, AC30 and guitars.

Note that Thomas Organ provided two Super Beatles each for John, George and Paul on this tour - the amplifiers (in particular the RCA power transistors) were not reliable at this point. There were doubts too about the speaker cabinets.

Chicago, 12th August, 1966.

A second solid state Thomas Organ Super Beatle from this tour was sold at Chicago in late 1966 - the advert for that to follow.

19th August

The "Phoenix Gazette", 11th March, 1965. The Music Center was part of the Totem Department store in Phoenix.

Although the Bass Amp is described as being 100 Watts, it is in fact an AC50 Foundation Bass, as the Thomas stock code V-1-14 indicates - a good early instance though of a particular Vox amp being available (at least for demonstration) in the USA.

The advert is a panel in a full-page spread taken by the store in the Gazette.

The store details at the head of the page.

On a slightly different note, it is interesting to see that alongside The Beatles, The Dave Clark 5, and the Rolling Stones, a small local band is listed - "Vox Guitars & Amps featured by ... The Pendletons ...":

The "Scottsdale Progress", 4th June, 1965.

18th August (2)

Recently sold on ebay, an early Thomas Organ Vox Treble booster unit, accompanied by what may be its original box. Interesting to see that "Treble-Booster" has a hyphen. This has sometimes been used as a means of sorting English made units (which always have a hyphen) from US-made units which generally don't.

This Treble-Booster, however, is US-made, probably early (late 1965?). One can tell by the washer around the jack socket. US-made units always have metal. English-made units have rubber.

The three images above are of the US Treble-Booster, recently sold. Early Thomas Vox catalogues depict English-made units, however.

An English-made booster. Note the rubber washer. The jack socket assemblies were made by REAN, a few roads over from JMI in Dartford. See .

18th August

A new page coming on Vox compact PA speakers. Below, a unit from c. 1966 (?), no logo fitted, original driver (most like a Celestion T1088) now replaced. The loose wiring loom and Rendar jacks seem to be original. No hole for a socket was ever drilled in the cabinet.

The cabinet, which has a sloping front, is constructed from 1/2" Birch ply. Dimensions are 14" x 14"; 6 3/4" deep at bottom, 7 5/8" deep at top.

On the upper back panel, a couple of keyhole-shaped holes for hanging the speakers on nails or screws on a wall.

These units were produced from 1964-1968 to accompany Vox PA amplifiers - the principal uses envisaged being factories, clubs and theatres.

The speaker cabinet page from the Vox dealer catalogue printed in February 1964. At top, an early wall speaker.

A detail from the page before the one above in the catalogue, listing the PA amplifiers available and their potential uses. Note that four speaker outputs were provided.

17th August (3)

Just to note that the earliest instance to have come to light so far of the Thomas Organ Vox advert featuring The Beatles is in "Downbeat" magazine, 1st July, 1965, in other words around three months after the big advertising push at the 4th Teen Age Fair in San Mateo and Los Angeles.

Also published in "Downbeat" magazine on 23rd September, 1965, and repeated in the issue for 16th December.

17th August (2)

Juan e Junior with an AC100SDL and two Vox 7120 amplifiers

A picture said to be of Juan e Junior and their band, c. 1970. In the background, an AC100SDL and two Vox UL7120s. These may have been the ones issued to or purchased by Los Brincos, c. 1966/1967. Los Bravos also had two, but the amplifier sections were replaced by Vox Supremes.

If on the other hand the UL7120s belonged to Juan e Junior, then at least six must have been sent to Spain.

17th August

Below, a detail from another picture of Los Brincos, taken in the second half of the 1960s, possibly towards the end. One can just make out that the bass speaker cabinet contains 2 x 15" drivers (which is what one might expect, but good to have the corroboration nonetheless).

The striking thing though - thanks to Ihor for pointing this out - is the swivel trolley. These are very uncommon.

A swivel trolley is certainly envisaged, however, for the T60 cabinet (exactly the same size as a 2 x 15") in the parts list compiled and circulated by Thomas Organ in the USA, c. 1966-1967. See the detail below. Perhaps production numbers were low. At any rate, it seems that Paul McCartney was not, as has occasionally been ventured, the only bassist to have one. Thanks again to Ihor for the info.

Los Brincos with Vox AC100s

Vox T60 components list. 09-5222-0: Swivel Stand Mounting Hardware and Chrome Knobs.

13th August

Recently on ebay again, AC100 serial number 1405, the power section redone at some point with new components.

4th August

Great pic of Los Brincos, c. 1965, with their AC100s:

3rd August

Before and after pics of serial number 241, black panel, from late 1964 / early 1965. The power section has been rebuilt, keeping as far as possible to original form. The cathode resistors are 330R however instead of 270R. 270R is killing for all but the strongest valves.

Upper chassis before - the amp had been converted to an AC50 in the early 1990s.

Upper chassis after.

Power section as it was: early 1990s - July 2019.

Preamp as it was: early 1990s - July 2019.

Restored - August 2019.

28th July

Recently sold in Northern Ireland, AC100 serial number 1935, produced mid to late 1966. Square corners to the back panel, double pins on the corner protectors. Thanks to David for the pictures.

18th July

Some details from AC100 serial number 241, black panel, unpainted shrouds to the Woden transformers: mains = part no. 72191, output = part no. 72192, and choke = part no. 72193, in other words the set used in the earlier copper panel amps.

Produced very late 1964 or early 1965. Sold and used in England. Converted in the early 1990s to run as an AC50 (2 x EL34) - so needs some putting back to original format.

Certain early serial numbers (all hand-stamped) were prefixed with a "0" - 0185, 0221, 0241, 0254. Most, however, are just the three digit number. Later *machine-stamped* plates almost always have five digit numbers: 00784, 01099, and so on.

Pot date code "JL" = November 1964.

Woden mains transformer, date code "KV" = November 1964.

Gold-coloured TCC 32uf capacitor, date code "VG" = July 1964.

Green TCC "Micromite" 32uf capacitor, date code "VF" = June 1964.

14th July

An advert for Egen potentiometers in "Wireless World", July 1952. Vox used Type 115. There is a general page on Egen Electric Limited , and two further pages on the date codes stamped by Egen on their pots: one probably most relevant at present to the (late summer 1965); and a second for the (late 1965 to 1967).

13th July

Below, small images of two pages from the first Thomas Organ Vox Price List - "Effective April 26, 1965" - in other words ten or so days after the competition sponsored by Vox at the 4th Teen Age Fair - . The leaflet has four pages: Front cover, Guitars, Amplifiers and Sound Equipment, Cases and Accessories.

Front cover, and page for Amplifiers and Sound Equipment. Sold on ebay in May 2011 - .

Small though the pictures may be, they are just large enough to make out the text. Note that the amplifiers all have their new American names. Below, a copy (made in "Word") of the page.

Copy of the amplifiers page from Price List dated 26th April 1965. At this point, one could not buy an AC100 amplifier section separately, as one could in England. See the "NOTE" in box.

Below, details from the Thomas Organ Vox catalogue from late summer 1965 - the "King of the Beat" - the first to give the amplifiers illustrated their new designations - ie. the AC100 is the "Super Beatle" and so on. Since the Price List represents an earlier state of affairs, there are discrepancies - there is no "York" below, for instance, and no "Pacemaker", "Cambridge", "Berkeley" or "Essex Bass" above. The number of inputs mentioned serves as a useful means of correlation:

The "Viscount" is still the AC30

In the first illustrated catalogue - the "Million Dollar Sound" catalog - issued by Thomas Organ (in late 1964), items still have English names - . The reference in the title is to the order for $1,000,000 of equipment placed by Thomas Organ in late August 1964.

8th July

Below, AC100 SDL serial number 954, with original cover for the amplifier section. Thanks to Michael for the pictures.

The amp is , where there are further pictures.

6th July

And of course, the same amp again (as in the catalogues below) in the advert published in "Beat Monthly" magazine, April 1964 - "Vox went the Beatles, USA":

5th July (2)

Below, the thin-edged AC100 pictured in the JMI catalogue of February 1964. The page on which it appears .

A detail from the Vox dealer's catalogue, same date as above, showing the same AC100. Thanks to Martin Kelly for the image.

The amp cannot at present be identified in pictures from the period, but as more and more come to light, it may ultimately be possible to spot it in action. JMI initially kept a reasonable number of AC100s to lend out:

NME Poll Winner's concert, 26th April, 1964: two thin-edged AC100s on one of the wheeled platforms on stage.

5th July

Below, the well-known publicity picture of Billy J. Kramer and the Dakotas with an array of Vox equipment as printed in "Vox Teen Beat" magazine, no. 1, late March or early April 1965, though the shot was taken a little while earlier - late 1964 in the United Kingdom. This picture regularly features in Vox catalogues, brochures and so on. One also finds it as a framed print, part of a set supplied to dealers by JMI and Thomas Organ in 1965.

The thin-edged AC80/100 on end is actually the one used by the band (along with Gerry and the Pacemakers) on the T.A.M.I show, 28th-29th October, 1964. See the entry below, for 28th June.

Vox Teen Beat magazine, late March or early April 1965
Vox Teen Beat magazine, late March or early April 1965

As ever, compare the arrangement of diamonds on the grille cloth.

3rd July

Pictures of the first edition (1960) of Shirley Douglas' "Easy Guide to Rhythm and Blues for Bass Guitar" now .

Along with her partner in music Chas McDevitt, Douglas was a long-standing Vox user and promoter, appearing in various flyers and brochures.

The second edition of the Guide (1963) was updated with newer pictures of bands with Vox amplifiers and guitars. The third edition (1970) preserved substantially the same text, but Vox no longer figured.

This copy was sold at Jim Marshall's shop (Marshall amps) in Hanwell.

30th June

Letter from David Turner at Jennings Musical Industries to Eric Easton, manager of the Stones, and the cover and back page of the programme to which it relates:

Programme front cover. The tour ran from 24th September - 17th October, 1965.

Dezo Hoffman photgraphs. Other photos from the session on the right (from 1963) show that the AC30 and T60 cabinets have no speakers in them. The T60 amplifier box is also empty. The advert as a whole was later recycled by Thomas Organ in the USA.

For info on UK package tours, 1959-1967, along with programmes, bills, and flyers, see the indispensable site.

28th June

Below, a rough print picture from NME, October 16th, 1964 - the Animals performing at the "KYA Swim Party", Cow Palace, San Francisco, 3rd October.

The amp indicated by an arrow is an AC100, perhaps belonging to one of the other bands on the bill, or a spare, as it is evidently not plugged in.

If anyone knows where the original photo is held now, do please let me know.

On the back panel: serial number plate in the centre, white warning plaque low down at left.

The other acts on the bill were: The Beau Brummels, Chuck Berry, Chad and Jeremy, Bobby Freeman, The Coasters, The Hondells, Lou Johnson, Sonny Knight, The Olympics, Roy Orbison, The Shirelles, and The Spearmints.

24th June (2)

Serial number 772 currently on - one of the nicest Mark 2s and an original set.

24th June

Further to the recent posts on thin-edged AC80/100s, details of the amp loaned to the Stones by JMI for the short European junket in October 1964: 18th (Brussels), 19th-20th (Paris). Pictures taken on the 20th at the Olympia Theatre. The first is held by Getty Images.

Photographs of this amp have so far only come to light from Brussels and Paris. Note that the speaker cab has corner protectors.

Paris, Olympia Theatre, 20th October, 1964.

The arrangement of the diamonds on the grille cloth of two of the amps used by the Stones in England in August '64 can be seen in the entry below for 11th June. For Bill Wyman's first amp, used intensively from late March to late July '64 and sporadically thereafter (well into 1965), see the entry for 11th May.

23rd June

The T.A.M.I Show, 28th-29th October, 1964, Santa Monica Civic Auditorium, California. JMI provided an AC100 bass and two AC30s for Gerry and the Pacemakers and Billy J. Kramer and the Dakotas. The Rolling Stones had their own gear.

BASS flag on the speaker cabinet just visible.

The striking thing about the amplifier section is its rather stretched grille cloth, resulting in some bendy diamonds lower right. So far it has not been possible to identify this amp in other pictures or among the survivals (though two have lost their original box, and two have been regrilled). But it may be that further shots will turn up.

Below, a provisional list of numbers of *thin-edged* AC80/100s owned by bands in 1964 (attested in the photographic record), and amps seen to have been provided by JMI for particular concerts. Amps in the second category, however, may have served two or more events and at some point presumably found their way into the hands of groups or into shops.


Rolling Stones - 4 - two serial numbers known at present.

Beatles - 5 (perhaps 6) - two serial numbers known at present.

Sounds Incorporated - 1.

Screaming Lord Sutch - 1.

Jonny Milton and the Condors - 1.


Featured in catalogues and adverts - 1.

NME Poll Winners (April '64) - 2.

Swinging Blue Jeans - 1.

"Ready, Steady, Win" competition (September '64) - 1.

Rolling Stones (October '64) - 1.

Arthur Howes/NEMS Package Tour (Oct. and Nov. '64) - 1.

Gerry and the Pacemakers / Dakotas (October '64) - 1.

Taken together these amps go some way to filling the gaps between the amps currently known to survive, the main gaps being: serial numbers 151 to 168, and 186 to 200.

22nd June

Some better pics of the first sighting of serial number 225 in the States - Vox Teen Beat magazine no. 1, issued in California in late March / early April 1965. The magazine as a whole .

It seems likely that amp and cab were flown to Sepulveda in late '64 or very early '65, perhaps (operative word at the moment) having been loaned out by JMI in England in November and December - see the detail of the photo of The Kinks in yesterday's post.

The picture as printed in the magazine. No header or caption is given.

One also finds this - the original photograph composited with various bits of text, including the Teen Beat header and a highly inventive caption, both of which are here cut away.

21st June

A note on , a JMI demonstration AC100 SDL (with early cab and basket-top trolley) found in Colorado around twenty years ago by a Korg representative and acquired by Mitch Colby.


Serial number 225 - brown grille cloth, thick edged box, no corner protectors. In some published photos serial no. 169, which does not belong, is shown on top .


Detail of the capacitor network protecting the Midax horns from low frequencies. The same arrangement can be seen in the bottom shelf of one of the Beatles' cabs - photo taken 20th June 1965, Paris.

Over the years, various comments about the AC100 were posted on the the "Plexi Palace" Vox forum (now sadly gone), the most interesting being that the speakers in the cab - Celestion alnico T1088s - had been found (ie. following inspection) to have "November 1964 date codes".

The cab is unlikely therefore to have been ready for use before the second half of November / early December. One suspects that both it and its amp were shipped to Thomas Organ - Sepulveda rather than the branch in Niles (572 Golf Mills Shopping Center) - at some point relatively soon after that.

As far as the amp is concerned, November is perfectly in order in terms of production. AC100s in thick-edged boxes are first seen around this time - photo of 20th November . But one has to temper this with the fact that such boxes were being illustrated as early as September:

"Melody Maker" magazine, 12th September, 1964. The dimensions given are a little peculiar though.

Four cabinets with basket-top trolleys had already been produced in August 1964 and a number presumably followed, September to December, though quite how many is impossible at present to say. Probably only a handful.

Serial number 225

Detail from a picture of the The Kinks from Getty Images - "Top of the Pops", either 5th or 19th November 1964. On stage a loan AC50, an AC100 SDL and AC100 bass. Both amps are thick edged, apparently without corner protectors, and clearly not no. 225. Are the cab and basket-topped trolley those of no. 225? Very close if not.

The four early cabs

"Melody Maker" magazine, 25th July, 1964. "The four loudest amplifiers in the beat world...."

The amps in question were the AC100 SDLs designed for John Lennon and George Harrison. Paul's AC100 bass had been issued to him in late December 1963.

Two were given to the Beatles in the first week of August '64. The other two were evidently retained initially for promotional purposes, being shown at the "British Musical Instrument Industries" Fair (24th-28th August) while the Beatles were on tour (18 August - 20th September).

On the Fair, which took place at the Russell Hotel in London, .

17th June

Just to signal that the black panel amp that recently came to light is not serial number 254 but 263.

was exported to the States early on doubtless by JMI. Serial number 263 has always been in the UK.


13th June

A great pic. by John Taylor of Mary Wells and Sounds Incorporated on the Arthur Howes tour, Edinburgh ABC, 19th October, 1964. Top of the bill were the Beatles (one of their amps visible in the background. At least five thin-edged AC80/100s were present on the tour.

Edinburgh ABC, 19th October, 1964. For other pics taken on the tour, .

11th June

A third AC80/100 used by the Stones (Bill Wyman). Its distinctive back panel - with speaker sockets of various types - is known from a shot taken at the Wimbledon Palais, 14th August, 1964.

Wimbledon Palais, 14th August.

It is clear from details below that this was the amp that Bill had at the 4th National Jazz and Blues Festival, Richmond, 7th August:

Part of the amps's distinctive panel glimpsed on the Richmond stage through Keith's AC30 stand.

A sliver of the front of the amp caught in a picture of Mick Jagger.

This amp is clearly not the one seen on stage at Longleat on 2nd August (Bill's second AC80/100) - compare the arrangement of the diamonds on the grille cloth.

Longleat, 2nd August, 1964 - Bill's second AC80/100.

Below, Essen, Grugahalle, 13th September, 1965. Is this Bill's third AC80/100 (as seen at Wimbledon and Richmond, above)? - the white banana plug sockets removed, the serial number plate moved to cover the holes, and the chassis as a whole now in a thick-edged box.

Note far right on the back panel the Bulgin mains connector, a distinctive feature of the Wimbledon/Richmond amp. Bulgins are not common on AC100s.

9th June

A quick shot of two Thomas Organ catalogues side by side: "King of the Beat" from late summer 1965, and "The British Sound", from early 1966.

In the "King of the Beat" catalogue the text in the panel reserved for the details of "Your Vox Dealer" reads:

Manufactured by Jennings Musical Industries Ltd, England

Distributed in the United States by the Thomas Organ Co., Sepulveda, California

In the "British Sound" catalogue the text is:

Manufactured expressly for Thomas Organ Co., Sepulveda, California

under license from Jennings Musical Industries Ltd, Dartford, Kent England.

Although the "British Sound" catalogue still contains a good number of items assembled in and shipped from England (the AC50, AC100 and so on), production was clearly in the process of being reformulated - guitars farmed out to Italy, and the new Thomas Organ solid state amplifiers built locally at Sepulveda.

Thomas also came to make its own arrangements for the production of the Treble, Bass and Distortion boosters. The earliest Treble units in the States - as represented in the "King of the Beat" catalogue - were probably English made, however.

English-made boosters always have a hypen: "Treble-Booster". The second generation boosters made in the States have none. Details are being collected .

None figure in the "Million Dollar Sound" catalogue from late 1964 / 1965 - .

3rd June

Bill Wyman's second AC80/100 - brown grille cloth, V O X in individual letters - pictures from the concerts at Longleat House (2nd August, 1964) and Olympia, Paris (20th October, 1964).

Longleat, the stage apron. The thin-edged AC50 is the PA amp, two microphones feeding into it. Brian and Keith have an AC30 each. The AC80/100, with two Foundation Bass speaker cabs, is Bill's.

A detail of the AC80/100.

As above.

At right, the top of the amp, one guitar lead plugged in. Detail of picture from Getty Images.

Paris, Olympia, 20th October, 1964. Detail of picture from Getty Images.

Pictures of Bill's first amp - with BASS runner and moulded VOX logo - can be seen in the entry for 11th May, below, and .