[TenTec] 1208 Transverter

[N4PY]

These 2 diodes are on the 14 mhz path, not the 50 mhz path.

Carl Moreschi N4PY
121 Little Bell Drive
Bell Mountain
Hays, NC 28635
----- Original Message ----- 
From: "Dr. Gerald N. Johnson" <geraldj at storm.weather.net>
To: <davidcuttler at yahoo.com>; "Discussion of Ten-Tec Equipment" 
<tentec at contesting.com>
Sent: Wednesday, January 14, 2009 12:58 PM
Subject: Re: [TenTec] 1208 Transverter


> On Wed, 2009-01-14 at 07:55 -0800, David Cuttler wrote:
>>
>> So what will the operational difference be if I replace the "real" pin 
>> diode with one of the other types like the 1N4007?
>>
>>
> There will greater intermod both receive and transmit with the 1N4007
> over the true PIN diode, and more than that with the 1N4148.
>
> I  know I've seen an article on the topic, probably in VHF
> Communications. Found it in the index:
> 1994/1 "Intermodulation Properties of Switching Diodes" by Dr Ing Jochen
> Jirmann, DB1NV, pages 12 - 18. Last year that article was probably
> available on-line, today I think it isn't but the publisher will sell
> back issues.
>
> It might be at:
> http://homepages.ihug.co.nz/~jaking/TS-940_02.htm#_Toc155846465, or
> might not.  Yup there are scans of the article, it will load slowly
> at the end of a long web page.
>
> 73, Jerry, K0CQ
>
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