Watkins Westminster valve amp
3 Attachment(s)
Hi, I am repairing a Watkins amp - even though it works I am going to change all the Hunts caps, and the electrolytics, and any resistors that are out of tolerance. I think it dates back to about 1956 and the valve line up is: 2x ECC83, 1X 6AQ5, 2XEF86, 1XEL90, 1X EZ80 which I will also check out. Does anyone have the schematic / circuit diagram or know the exact model - see pics.
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Re: Watkins Westminster valve amp
I can't find anything about that chassis that's shown for the Westminster, but I'm no expert.
Lawrence. |
Re: Watkins Westminster valve amp
That's a lot of valves for a single ended EL90 amp. Maybe they are used for effects or the OP has the line up wrong?
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Re: Watkins Westminster valve amp
I think a 6AQ5 is an equivalent to the EL90. Which, given one of each in the lineup, suggests it could be a push-pull output stage using those 2 valves
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Re: Watkins Westminster valve amp
Not found a schematic but this page gives more details about the Westminster models.
http://www.vintagehofner.co.uk/brita...stminster.html Al |
Re: Watkins Westminster valve amp
The output transformer looks like a Radiospares Hygrade…?
Lawrence. |
Re: Watkins Westminster valve amp
Again no schematic but the third picture in post #1 looks identical to this one on the site mentioned by Alistair D
http://www.vintagehofner.co.uk/brita...er/west21.html c1956 WATKINS WESTMINSTER AMPLIFIER COURTESY OF MICHAEL KERR, ESSEX, ENGLAND: and the internals:- http://www.vintagehofner.co.uk/brita...er/west19.html |
Re: Watkins Westminster valve amp
Edward , with all due respect the valve line up is correct - when I said I would check the valves I meant the condition of the valves not the line up . Yes there are a few valves but they are the right ones - if you read my post it says the amp is working - so they can't be the wrong valves !
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Re: Watkins Westminster valve amp
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Re: Watkins Westminster valve amp
Cheers, it was the colour on the label that made me think it might be RadioSpares, followed by the 6 tags on one side.
Lawrence. |
Re: Watkins Westminster valve amp
Hi , yes I checked vintage Horner , I guess the 1956 one is the closest to mine - will work off that schematic - very similar to mine
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Re: Watkins Westminster valve amp
Quote:
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Re: Watkins Westminster valve amp
Hi,
According to the r-type valve site the EL90 design is the classic 6V6 squeezed into the tiny B7G envelope! Maybe they were trying to get near the Fender amps of the time which used 6V6's, but it was probably more like they were plentiful and at good price at the time :) From memory the PYE HF5/8 used a pair of EL90's. Terry |
Re: Watkins Westminster valve amp
Quote:
Cheers, GJ |
Re: Watkins Westminster valve amp
1 Attachment(s)
This one?
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Re: Watkins Westminster valve amp
6AQ5s were very common in Australia. They are a 6V6 in a seven pin bottle but have maximum (recommended) HT of 250 volts. They sound delicious, just like a 6BW6, 6V6, 7C5 or 6AQ5/EL90. It will be a very nice little amp. In theory its good for about 10 watts RMS.
Joe |
Re: Watkins Westminster valve amp
Your amp looks exactly like the one in the main pic on the WEM site -
http://www.vintagehofner.co.uk/brita...stminster.html it has the same bare patch on the corner and the dinks in the speaker grill match up. Can't find a schematic but yours looks to be the same as this one - http://wem-owners.com/combos/westmin...tminster-1968/ which gives the date as 1959, so it's a very early one. The schematic in post #15 looks to be about the nearest you'll find for the OP stage. I'd guess the EF86's are a mic preamp section. does it have a tremelo? Andy. |
Re: Watkins Westminster valve amp
Ah - the late great Charlie Watkins; WEM stands for Watkins Electronic Music. Died in 2014 at age 101. Around 20 years ago I fixed up a Dominator Bass cabinet for my son, and Watkins was still answering the phone well into his 80's!
You'd need a purple phone to get him now, alas. Craig |
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