[TenTec] Fwd: OmniVI logic board work

[Glenn]

Hi Barry,


This has been my experience as well. But having some decent equipment on hand 
allows me to confirm my hunches.. Hi


I do appreciate your feedback. 


Have you heard anything about the DDS replacement for the Ten Tec PTO in terms of how clean it is? 
I have been rebuilding Ten Tec PTO's for over 10 years using Mobile One synthetic grease and to the best of my knowledge,
none have failed. Of course, I don't follow all of the ones I did for clients. I have two Corsair II's in my shack. One I rebuilt the PTO 10 years ago and the other
was about 6 years ago. Neither of them have given problems. They are stable, clean and work very well. 
I have not looked into the PTO stabilizer circuit but plan to do s at some point.


I don't know how clean the DDS board is and again with my interest in weak signal work, I don't want to risk losing ground.
I have found a large quantity of the unobtainable IC's in the Corsair frequency counter but so far don't have the means to program them.


One other tidbit... again in my opinion, the Timewave 599ZX audio  DSP filter works very well with the Corsair; It's AGC action is faster as well. I also like the bypass switch
if I need to quickly pull it out of the audio path.


Glenn WA4AOS
DSM Labs (dot com) 


My two cents:

- don't bother with the strong off-channel signal; the K3 and the O6
fitted with IR cw roofing filter will easily handle this
- it's really not that important that the two closely separated
signals be that weak; the K3's failure to separate closely spaced
signals occurs regardless of signal strength in my experience

Barry N1EU





-----Original Message-----
From: Barry N1EU <barry.n1eu at gmail.com>
To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
Sent: Thu, Sep 29, 2011 10:59 am
Subject: Re: [TenTec] Fwd: OmniVI logic board work


On Thu, Sep 29, 2011 at 2:22 PM, Glenn <wa4aos at aol.com> wrote:

> The test I would like to perform is with two weak signals, less than S1 in the 
passband and an S 9 signal 2 KHz above then 2KHz below the passband.
> My guess is the K3 may get the nod here due it's close in dynamic range. 
However, I know how bad the K3 resolves multiple signals close  together
> at .1uv. I'll need to increase the output of the generators enough so that the 
K3 does clearly resolve/process the two signals.

My two cents:

- don't bother with the strong off-channel signal; the K3 and the O6
fitted with IR cw roofing filter will easily handle this
- it's really not that important that the two closely separated
signals be that weak; the K3's failure to separate closely spaced
signals occurs regardless of signal strength in my experience

Barry N1EU
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