vintageHIWATTconvention.com

Today I bought a new old Hiwatt, it's an early seventies DR103, serial # 1362. It even came with a quad of Mullard EL34's Only thing done to it years ago was replace a faulty v2 socket, which could benefit from some attention.

Now what kind of preamp is this, I can't find a match in the schematics.. http://www.pictureshack.us/images/39879_P1050921.JPG

Thanks for looking

Congrats!
You have the classic early 1970's "DR" preamp.
The standard that Dave Reeves instructed HJ to build from mid 1970-1976

Hmmm are you sure it's the standard early type preamp? It looks like something's missing next to the 220pF treble cap, and there are 2x 82k resistors (no 91k) in the phase inverter circuit. Also, there's nothing installed in the middle of the main board, where the middle screw is visible.

I'll have to look close later, there is a missing .001uf cap and 100k resistor

it is not uncommon to see two 82k resistors instead of one 91k and one 82k

can you take another pic from the rear that better illustrates the potentiometers?
thanks,

Here are two more pictures, you can see the labels on the pots. I can take more pics tomorrow if you need it.

http://www.pictureshack.us/images/55048_P1050924.JPG
http://www.pictureshack.us/images/3494_P1050925.JPG

Did you find out anything about this preamp yet

Oh, and did you guys see my email to the VHR shop?

Thanks!

can you resend the email?
thanks!

Oh I found the caps I need locally, so no more need

BTW this preamp almost matches mine, except for a few component values: http://hiwatt.org/Schematics/DR103sn1489pre.jpg
It has a Marshall like tonestack, but with only one half of V2 used like most regular Hiwatts.

The new filter caps came in, so I replaced the old ones. I also redid the V2 wiring. Almost ready to rock
http://www.pictureshack.us/images/83030_P1050927.JPG