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Rare CP103 amp on Ebay
Posted: Thu Aug 06, 2020 11:53 am
by shakti
I missed this one, but interesting to see what looks like a stock CP103 spec amp from the late 70s:
https://www.ebay.co.uk/itm/Hiwatt-DR-10 ... 7675.l2557
Re: Rare CP103 amp on Ebay
Posted: Sat Aug 08, 2020 12:13 pm
by shakti
When it rains, it pours....here's another one!
https://reverb.com/item/35114883-hiwatt ... end-dr103w
What do the experts make of this? I *think* I see marks from a star washer under the extra preamp hole which makes me think it could have started life as a PA amp, but I'm not sure. Also, this one has the late 70s phase inverter. The experts will know better than I do, but isn't 1974 a little early for that?
Re: Rare CP103 amp on Ebay
Posted: Sun Aug 09, 2020 4:44 pm
by Dr.HI-TONE
I would ask for several more pics of the one on reverb.
Re: Rare CP103 amp on Ebay
Posted: Sun Aug 09, 2020 10:33 pm
by mhuss
There are clearly wear marks on the 'unused' tube hole. It's probably (as you guessed) a PA conversion. I must say, it's a very good one!
FWIW, this one (5075) and 5073 are in the registry as 'W's...
Re: Rare CP103 amp on Ebay
Posted: Mon Aug 10, 2020 4:47 am
by shakti
Yeah, if it is a fake, it is a rather good one. The faceplate is also a little odd - if a fake, why not make one with «The Who» labeling? I don’t think I’ve seen that variation on the 4-channel faceplate before.
Re: Rare CP103 amp on Ebay
Posted: Mon Aug 10, 2020 10:06 am
by shakti
Another slight oddity; shared cathode resistor and cap for V1 and V2. Not something I've seen in any other CP103. I'm confused about this one, many things point to it being original (circuit or faceplate not copied directly from any other known variations, preamp board and wiring style looks very good and original to my eyes), but that extra preamp hole looks to have wear and marks from a previous preamp tube.
Logo is also placed a little oddly. Should be pretty easy to identify in photos of Who amps from the mid-70s.