Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
||Thread Tools||Search this Thread|
|15th October 2012, 10:04 PM||#21|
Join Date: Dec 2008
Seeing this response was a good moment. I think it puts many things together.
for a tube - the small signal parameters are as follows
........................ mu = gm x rp
where, mu is the maximum theoretical gain for a particular tube.
and rp is the plate resistance
for the common cathode amp above, Rp is connected in the circuit, so substitute Av for mu - without a load, the gain is as follows.
........................ Av = gm x rp//Rp
However, a switch could be connected in series with a load resistor - Rs.
Measurements, could be taken - switching the load resistor in and out.
so with a load resistor
....................... Av = gm x rp//Rp//Rs
Last edited by Uunderhill; 15th October 2012 at 10:17 PM.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Testing with test-records of RIAA amp.||Helmuth||Analogue Source||5||14th July 2011 08:52 PM|
|Mullard 12AU7 tests bad when running grid leakage test?||sbelyo||Tubes / Valves||6||10th April 2011 09:13 PM|
|SMPS gate drive - please educate me||Th3 uN1Qu3||Power Supplies||5||16th July 2010 04:48 PM|
|Amplifiers, AB comparative testing, a blind test method.||destroyer X||Solid State||34||29th September 2009 12:39 PM|
|Testing for cap leakage||taj||Parts||15||7th October 2007 08:31 AM|
|New To Site?||Need Help?|