[1000mp] Re: MK V service manual

[Steve Fraasch]

George:

Just FYI:

Someone here mentioned that they nulled the carrier, which is a good explanation.   I also have a MK V with a high gain amp (HF2500DX using 4cx800s) and I experience no visible overshoot problems.  After applying the INRAD Key click mod, I measured the cw envelope with a digitizing oscilloscope, and I measured a rise and fall time (10 - 90%) of 2.8 ms.  That's still a little quick (ARRL recommends 5 ms), but I saw no overshoot, ringing, etc.  I have had many listen and the opinion is that the 2.8 ms did not sound hard.  I did not measure the rise/fall prior to making the mod.

73,

Steve Fraasch, K0SF

-----Original Message-----
From: w5grg <w5grg at comforttexas.net>
Sent: Oct 18, 2005 8:03 PM
To: 1000mp at mailman.qth.net
Subject: [1000mp] Re: MK V service manual

I needed some parts for my MKV 200w radio and I ordered the service 
manual and parts from Yaesu, it was approx $25.00-30.00. The manual is 
actually called a "technical supplement" and it is part #EH006H901.
I have not tried my radio with an amp, but before I do I am going to 
build the SS t/r sequencer in the 2001 handbook and try that. I am not 
really sure that will solve the problem but I want to build one for my 
boatanchors anyway.
Thanks, George W5GRG
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