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Old June 19th 05, 05:20 PM
 
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Default Need Schmatics / datasheets

Hi

I've got 3 hot hamfest finds so far this season and need documentation
on each of them. If you have leads on datasheets or schematics I'd
appreciate hearing from you.

Here are the items:

1. A homebrew 420-450 MHz 20 watt amplifier that uses a a Motorola
"SHW158 612". A datasheet on the Motorola RF Module would help me get
it going (or at least tesed). The amp is missing 1 component (probably
a pot used to bias it).

2. A Heath HA-201A 2 meter fm amplifier. A schematic would allow me to
figure out how to re-bias this amp for linear service. Please note that
this is quite different from the HA-201 (without the "A" suffix) for
which there IS documentation at the BAMA site.

3. A Heath IB-1102 nixie based frequency counter. It's currently in
working condition but it triggers poorly at high frequencies. A
schematic / manual would allwo me to re-adjust it / modify it for more
reiable opearation at 100 MHz.

The commercial sources for documentation on the 2 Heath items are
asking very high (way more than the cost of the items themselves)
prices for the paper work.

Thanks in advance for any leads.

73,
Lenny W2BVH