[Elecraft] uh, you know

[John Wiener]

Hi Gary,

RE: k2

I rechecked Q5 base and collector values and they are as I stated.   
W1 remains at 40V on xmit.
I do not have a wattmeter.

Now, I am going down the DC voltage tables for the RF board.  So far,  
D1 thru Q2 are normal.

I am confused by the directions.  Directions are for receive unless  
specified, zero AF, mid set RF gain.  If, as you instruct, I turn  
power down to zero to read DC, then Q5 collector is zero, as is B, C  
and E of Q6.  Am I wrong, or is this to be expected when power is at  
zero?  If getting DC readings on transmit is fruitful, based on what  
you told me, how do I proceed to get accurate TRANSMIT DC readings?

Here are "Transmit, Mixer, Buffer, Band-Pass Filter, T-R Switch  
readings from page 14 of troubleshooting.
(Power set at 2)

RF readings:
2. Xmit Mixer Output   	Expected	.016 Vrms	Actual	.03
3. Buffer Output: 		Expected	.2			Actual	.211
4. Band-Pass Filter Output			.03					.35
5. T-R Switch Output				.029				.011

Pre-driver, Driver and PA
1. Pre-Driver Output	Expected	.120		Actual	.11
2. Driver Output					.026				.16
3. Driver Output					1.8					3.6
4. PA Input Q7					.38					.82
5, PA Input Q8					.38					.04
6. RF Detector Input				2					.7

7. PA Transistor Tests				
	Q7&Q8
	positive lead on base:		Expected at emitter and collector:	.6	 
Actual	.537

	negative lead on base:	Expected at emitter	1.3		Actual	.511
							Expected at collector	>3		Actual	"OL"

My PA voltage is too high and Detector voltage is too low: indicating  
defective PA transistor(s).  Does the above test eliminate them as  
the culprit?

Note: On my DMM, diode test shows "v" not "k"...the values seem to  
match but is this voltage or resistance?



John
AB8WH