Another method would be to transform the 50 ohm source impedance to
something higher before applying it to the detector. Each quadrupling of the
source impedance will double the RF voltage. This could be done with an RF
transformer, or a loosely coupled resonant tank circuit.

Joe
W3JDR


"Gregg" wrote in message
news:Q53Jd.48870$06.2762@clgrps12...
Behold, gudmundur scribed on tube chassis:

Hello all,

I want to try to detect signal levels of 50mv to 200mv peak to peak.
I need a passive circuit with no amplifiers, and I will be feeding a DVM
with .01v resolution. The problem I am having is that a 1N34 will not
conduct very well at these low levels. Is there a more suitable diode?

6AL5?

Just input from a tubehead ;-)

--
Gregg "t3h g33k"
http://geek.scorpiorising.ca
*Ratings are for transistors, tubes have guidelines*