[1000mp] Icom vs Yaesu QSK???

Wed, 10 Mar 2004 18:53:35 -0500

I expect that the only ops who really may notice this are those who do a 
high percentage of running (cq'ing) in qsk w fast AGC under high qso-rate 
contest conditions.  I should have also mentioned that the slow recovery 
isn't noticed when there's a strong signal in the passband, probably since 
the gain doesn't need to rise to the level required with a weak or no signal 
present.

I also suspect that some folks are experiencing this problem as a receiver 
that seems a bit deaf at first when they finish their cq and don't even 
realize it's the slow receiver recovery that's causing it.

But probably the vast majority of MP users aren't aware of the problem and 
aren't affected by the problem, which is definitely  intermittent, but 
definitely real.

I no longer use the MP in cw contesting, partly because of this problem.  
Other than the AGC and the intermittent rx relay problem, it's a fine rig.

73,
Barry N1EU

>From: "Tom Rohlfing (home)" <[email protected]>
>Reply-To: [email protected]
>To: <[email protected]>
>Subject: RE: [1000mp] Icom vs Yaesu QSK???
>Date: Wed, 10 Mar 2004 16:18:41 -0700
>
>This one catches me by surprise.  I talk to a group of CW ops every
>morning on 80 meters.  Their signal strengths vary from noise level to
>S9+40.  I can't say I've ever experienced any kind of "recovery" issue
>as you have apparently noticed.  I almost always just leave my AGC
>setting on "Auto," and admittedly don't know whether that is slow or
>fast or something else for the CW mode.  I did put in the Inrad front
>end mod, which I believe included some kind of AGC mod as a "bonus."
>
>Is the phenomenon you described one that you would expect to observe in
>roundtable QSOs with a mix of weak and strong signals at 35+ wpm?  Or
>would it only show up in contest conditions for some reason?
>
>73,
>Tom / W7GT
>
>
>
>-----Original Message-----
>From: [email protected] [mailto:[email protected]]
>On Behalf Of Barry N1EU
>Sent: Wednesday, March 10, 2004 2:32 PM
>To: [email protected]
>Subject: [1000mp] Icom vs Yaesu QSK???
>
>I did a fair share of cw contesting with the MP, almost 100% qsk.  My
>issue
>with its qsk performance was certainly NOT objectional noises in the
>headphones or truncated characters.  It was the (at times) horrendously
>slow
>turn-around (i.e., recovery from transmit to receive) of the rig in fast
>AGC
>mode.  Fairly often, it would fall into a funk of taking several hundred
>
>msec for the s-meter to fall down and receiver gain to come back up
>(even
>with rf gain throttled back to 12 o'clock) and I would often lose the
>first
>few elements of calling stations.  The turn-around was actually markedly
>
>faster with slow AGC.  I owned two late MP's ('98 and '99) and they both
>
>developed this problem.  I've heard reports of newer MarkV's also
>behaving
>this way.
>
>73,
>Barry N1EU
>
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