[Milsurplus] Canadian Marconi CH-25 Parts Dealer

[Mike Feher]

Hi Dave –

 

That looks really handy, and even better, not heavy. Think I will get one. 73 – Mike 

 

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

848-245-9115

 

From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of David Stinson
Sent: Monday, December 30, 2019 9:32 AM
To: Mike Feher <n4fs at eozinc.com>; 'milsurplus at mailman' <milsurplus at mailman.qth.net>; 'Boatanchors at mailman' <boatanchors at mailman.qth.net>
Subject: Re: [Milsurplus] Canadian Marconi CH-25 Parts Dealer

 

Good Morning, Mike.
I bought this one.  
https://www.amazon.com/dp/B0759GKKBJ

So far, a very useful item that does what it says it will.
The only problem was an intermittent in one of the two signal output cables,
which was easily fixed by pulling the center pin of the BNC connector out a little
to seat it properly.  The various waveform choices confirmed that a 4 or 5 Volt square wave,
with either 0-to-rail excursions or +/- PTP would drive the crystal oscillator stage fully.
You'd expect to need a pulse or square-wave for a crystal oscillator, and that was 
confirmed in that a Sine Wave of 10-12V PTP to do the job, so Prog Oscillators will
work nicely.  There's a 9.2 VDC power buss available that will zener down 
for the supply, so it's just a matter of deciding on settling for the six available 
channels or building an external switch box.
GL OM DE Dave AB5S

p.s I also got one of those little NanoVNA analyser for my 630 Meter work.
Figuring that thing out is a head scratcher, and the nanovna.io group doesn't 
seem to "cotton" to newbies, at least so far.

On 12/30/2019 7:28 AM, Mike Feher wrote:

Hi Dave – 

 

Which two-channel DDS did you get? Thanks & have a Blessed and Healthy 2020 – 73 – Mike 

 

Mike B. Feher, N4FS

 

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