"xpyttl" wrote in message
...
All of the discussion about metal film resistors and a pF here or there of
stray capacitance is interesting, but the symptom sounds to me a lot like
a cold solder joint.


Hmmm. Thank you. That is definetly something I will look at again. Much
appreciated...

Dave

..

"John A" wrote in message
...

"Dave" wrote in message
...

What do you do for resistors if you can't get carbon composition in the
ratings you need?

Do what the professionals do - use film resistors. Concerns about
inductive
effect at HF are greatly exaggerated. There are rarely as many "turns" as
often suggested. ( cf. Radcom Jan 2007, p58, fig 1! )


where can I get carbon composition resistors these days?

They are still available. Typically, Farnell offer 220R to 4K7 at 1W -
but
they are quite expensive.


John A