vintageHIWATTconvention.com

Hi I am Mike and I am amp freak, bass player and amp tech. Found this site while researching a repair of a Hiwatt PA and what a fanstastic resource. As often mentioned on this site The Who are a big influence on my attitude towards music in terms of performance and sonically - and of course Hiwatt i...

Thanks very much for your help. I will get this fix done over the next few weeks and report back on the difference

Cheers

Sure thing . . .

Serial number is 1112 (dates it at about 1970 from what I can see on mhuss.com).
Attached is the underside picture of the DR112 and I can get many others pics if they can help.

Mike

I have just started working on repair for a friends DR112 6 channel Welcome to the Vintage Hiwatt Forum! At that age, all of the electrolytic capacitors are probably due for replacement. Nine times out of ten, that will cure the symptoms you report. Unless the transformer looks to have been submerg...

Hi glad to be here, Thanks for confirmation of the cap values. I just double checked the schematic against the amp. I didn't notice that the 16/32 cap on the schematic is supplying the preamps so that makes sense - I was mixing it up with the 220MFD cap on HT3. So as far as the 220 MFD caps goes it ...

Hi, I have just started working on repair for a friends DR112 6 channel forum. The amp's symptoms are that it fades in and out of volume and I noticed that two of the capacitors show signs of rupture so first off I plan to replace them in the hope that the rusty output transformer is ok. However I a...