The Vox UL730 power section schematic – OS/114

The Vox UL730 power section schematic – OS/114

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Above, OS/114 for the Vox UL430 and Vox UL730 power section, dated 28th February 1966.  Note that a small batch of pre-production amps – made at much the same time as the Beatles’ small-box 7120s – were built differently.  At least one of these early 730s survives (currently in the UK).

OS/114 indicates that the negative feedback line should only be for UL430 bass amps (FOR BASS MODEL ONLY).  As mentioned in the post below, UL760s had no feedback circuit to begin with, but at some point mid production one was subsequently added.

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At least one more Vox UL430

A Vox UL430 chassis on the work bench.  Note the small ding at the lower left corner.  This amp does not seem to be among the 430s already registered on this page.  The amp is included in the corrected total known to date a couple of posts below.


Possibly the same amp photographed more recently, though the detail is too small to tell for certain.

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Pics of a further Vox UL710 added

Pics of a further Vox UL710 added here, from an auction a little while ago, a distinctive scuff on its control panel.  Probably currently in the USA.

Most 710s have Bulgin mains sockets on their rear panels (including the one just posted). No. 1099, however, has an Amphenol.

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Vox UL430 and UL730 updates

Pictures of Vox UL 730 serial number 3002 with and without a cab now brought together.

Pictures of Vox UL430 serial number 1047 registered here, and three pics of serial no. 1052 in its former home in Messina added.  Six UL430s are now known (one not pictured) – five amp and cab sets, one amp + 460 trolley.

29th Oct. 2017 – to correct the statement above, it turns out that at least eight 430s are known to survive – five amp and cab sets, and three amps alone.


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Pics of two 4120s added

Pics of two 4120s added on this page  – serial number 235, which is new.  Thanks to Tim.  And an amp that spent a good deal of its working life in Wales paired with a Super Foundation Bass cab (towards the foot of the page, among the amps with missing serial plates, or numbers simply unknown).

Old pics of 213 have been now been matched up with a newer set showing the serial number.

Ten 4120s in total are currently known.  It seems likely that others will surface.

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New amps

A series of updates are in the offing (this coming weekend):

For the time being, a couple of 760s which came to light recently in the UK – serial numbers 1004 and 1041. The amps have been registered here.

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Joy Division / New Order

Joy Division / New Order

I can’t source the original quote or swear to the memory, so this could be total mis-recall – but years ago there was an interview with members of  Joy Division / New Order, in which they described how they originally looked for gear.  Vox equipment was associated at the time (mid 70s) with the music of the previous generation;  the swinging 60s were just a memory.  Considered the last decade’s fashion, there was now lots of old used Vox gear around going cheap.  Like I said, the memory could just be mixed up with some other band.  I think though it was Joy Division, saying something like how when they’d started off, they looking for something they could afford, but on top of that they were looking for something different;  I think there was a suggestion that ideally they would have liked something with a more industrial/mechanised edge,  and possibly even avoiding having to use guitars and drums, but the technology didn’t really exist at the time.  Again the recall is very hazy,  but I think they described rooting round some shop, and finding buried at the back the metal-front vox amps & gear, and either the counter-fashionable sound and looks of the vox gear won them over, or the cheap price.   Anyway, whatever the original story/motivation was,  Ian Curtis ended up with at least one Vox Phantom; what looks like a Vox  Supreme cabinet is often seen, and then… there are the hybrid Vox heads, with trolleys & cabinets.  These have usually been described as 730s; it does seem they started with a couple – but with the move to New Order, we have discovered there was a 4series head too that was often to be seen, and heard.


A post on geekchat   links to some good early Joy Division photos; these show what appear to be two 730s (could also be 715s, the cabs appear to have microphones placed in front).



Here they are at T J Davidson’s ‘rehearsal rooms’ (an empty factory floor). “..We had an enormous factory floor to the winter we used to just brush all the rubbish to one end of the room and set fire to it to just keep warm”.


 Peter Hook allegedly borrowed a 730 in 2011 for (more…)

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Rolling Stones, 760s

Albert Hall, Sep. ’66.


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Doctor Robert, isolated guitar tracks

stripped-down version here,  probably through the 7120, where you can hear the guitar and bass more clearly….possibly using the Gretsch pictured in Papeback sessions?


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Lennon Gretsch auction, 7120 prototype, Paperback Writer Sessions

Signed print photos offered at (Gretsch guitar) auction, showing Lennon with guitar & new prototype 7120s;


From Reuters, here;


“..(Reuters) – A Gretsch guitar (more…)

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