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Re: [TenTec] WARC band crystal part numbers

To: tentec@contesting.com
Subject: Re: [TenTec] WARC band crystal part numbers
From: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Reply-to: geraldj@weather.net, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Fri, 28 Jan 2011 17:04:27 -0600
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Now that I've down loaded and studied the manual, I see. Shades of the 
mixing schemes of Collins 75A, 75S, 32S, and KWM rigs as well as many a 
heathkit with a tunable IF. With all the tx mixer crystals well above 
the output frequency no crystal harmonics should be problems at least 
not generated harmonics in the mixer if the bandpass and PA low pass 
filters are working.

Just hope Tentec remembers the Delta takes different crystals than the 
Omni C. I see the Delta schematic shows crystal tolerances of .001% for 
the 3 rd overtone crystals that are probably series resonant. That's the 
most popular mode for overtone crystals which simplifies circuits and 

73, Jerry, K0CQ

On 1/28/2011 4:28 PM, N4PY2 wrote:
> The Delta does not have a 9 mhz IF.  It has two IF's with the last one being
> 6.3 mhz.  The Delta has not problems at all transmitting on 18 mhz with the
> mixing scheme it uses.
> Carl Moreschi N4PY
> 121 Little Bell Drive
> Hays, NC 28635
> www.n4py.com
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