"StuH" wrote in message
om...
Hi, first post!

First off welcome!


You'll like it here - it's a regular 'home from home' for UK valvies!! :-)


Im new to valve amps and decided to purchase one of
the afore mentioned as a cheap intro (ok, have a play with), Im
pleasantly surprised with what it offers.


So far, so good then! ;-)


Ive made a decent input
selector and had a good snoop around inside.


Heh heh? What is it with valve amps that makes people want to get the lid
off as soon as they've got them??


My only prob is how do I
bias the valves?? Ive no instructions on this. There are test points
at the side of the valve, I tried to get a DCV (350mV), and a
resistence (10ohms, I think) but TBH Im stuck, can someone help me
with this one???


Right, I've been studiously avoiding facing up to one this ever since I got
into valves - due to having mostly cathode bias amps and a pair with a test
socket which clearly states 1.56VDC!! :-)

I don't yet fully understand the relationships between the voltage and
current readings myself yet. (I'm working on it, or will be in the v. near
future!) I have 2 of these amps and measured them as follows - both amps
have a resistance of 10R at the test point, power off and Amp No. 1 (with
valves marked '1a: 31 mA') seems to have a bias voltage of about 0.31V
(-0.31V with the leads the other way round I guess) and Amp No.2 (with
valves marked '1a: 27 mA') seems to be at the 0.33V mark - although this is
yet to be checked properly.

Someone here (Wally?) offered some 'correct settings', but I'm going to have
to do this all from scratch and try to understand completely that which I
only know in the broadest terms atm. So I'll be posting here as well as
worrying the arse off 'someone' offlist....!!! ;-)