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philmanatee wrote:My 83 Biacrown DR- 504 is 517v B+. Phil

That's more like it. I'm in Toronto using 120AC.

460DCV is common to the 50 watters but not the 100s. It's the 1st time I've seen it on a 100 watter.

Anybody there???

I was was checking out a 74 DR103 today. Nice amp but when I went to check the plate voltage (or B+) I measured a suprising 451DCV :shock: Most other Hiwatts I've measured all read around 500-5115DVC. What can be wrong with this one?? The caps are good with no hum. Could this be a bum PT from the fa...

Thanks guys. That makes it 5 Hiwatts now. An all original 1975 Custom 50 watt Head with 4x12 cab , a DR103 Custom 100 from 79, two JP100s I built myself last year and now this one. I'm still waiting to find a 200 watter w/ KT88s like this one here: http://www.youtube.com/watch?v=3JVGjonKABQ&feat...

Nice score. That's the next Hiwatt I want to get (a 50 watt 1x12 combo). 8) That does look like a CA mod (or more to the point, a "modded CA mod."). Easily undone if you don't like it. --mark Thanks Mark. It sounds so good right now, I don't think I want to mess with it. Who (no pun inten...

Does that little curly yellow wire near V2 on the board mean a Canadian mod??

Just got it today... a 1979 two holler. Looks like it had a little mod done in V1. Other than that she is a beauty. 520VDC on the plates (tubes in @120VAC wall). Fane was replaced with a Vintage 30 which surprisingly sounds great... more towards a Marshall sound without the compression. I understand...

Nice hoard of British amps! What's up with that random hardwired fuse :?: :!: :?: It's soldered to the outside of a fuse holder, and in-line nonetheless :? . Unless I'm missing something, that mod is redundant. I'd take that one out. You don't want to have to remove the chassis and break out the so...

50 watter is not as loud as the 100watt and it breaks up a little sooner. that's the difference in a nutshell. if you want it loud, go for 100watts. otherwise a 50watter is more than enough.

Thanks.

Hello there, Does anyone out there have a step by step guide to converting a late 70's preamp to an early 70's preamp on a DR103?? I have a 1978 DR103 which needs to have a voltage double (+ bias pot) put in so that I can use some modern tubes. I put some Electro-Harmonix 6CA7EH in there yesterday a...

some more: http://cgi.ebay.com/VINTAGE-1972-HIWATT-CUSTOM-100-AMPLIFIER-MUST-SEE_W0QQitemZ230292475708QQcmdZViewItem?hash=item230292475708&_trkparms=39%3A1%7C66%3A2%7C65%3A10%7C240%3A1318&_trksid=p3286.c0.m14 this one looks nice... http://cgi.ebay.com/Vintage-Hiwatt-DR201-200-watt-KT88-Bass-...

http://cgi.ebay.com/Vintage-HIWATT-Cust ... 286.c0.m14

Hiwatts Rule!! I've had a lot of amps in my collection and nothing, I repeat, nothing is as loud or as sweet as my Custom 100. Two JP100s being built as I write, for which I will need cabs. Once I have some decent recording gear I will post clips.