Try using a short piece of 75 ohm feedline and watch the smoke come from
the caps over the finals - your existing phase detector won't work well
off the laboratory test bench. Most of the caps need to be increased
slightly and the two blocks which are bandpass filters will need to be
changed or modded to allow the full potential to reach the phase
detector located next to the output port, make sure you have a 80-110
watt phase detector board in place before you hike to the repeater site
and connect.
w9mwq wrote:
>
> I have a Micor TLD1693 amp, designed for the 150 to 162 Mhz range,
> and am told that the amp will not operate at the 146 Mhz range, told
> that componets have to be changed. Here is what I don't understand
> about it, maybe someone can help expain it. Into a Cushman serive
> monitor, I'm getting 100 Watts out of the amp at both 146.925 and
> 154.115 Mhz, keyed down the temperature is the same after a 5 min
> keyup test, allowed to cool down for each test. I see no spikes or
> spurs at either frequency. Granted this will be used on a repeater
> and key down times can go much longer, but why would this amp not
> operate at 2 meters, just cause Motorola says the specs are for 150
> to 162. I've seen amps go from 138 to 174 with no problems, just a
> matter of tweaking. So help me to understand what the difference
> really is between the TLD1693 and the TLD1692 amps. Thanks.
>
> Mathew
>
>
> Yahoo! Groups Links
>
>
>
>
--
73...Clark Beckman N8PZD
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