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Author Topic: tuning a tpl uhf amp  (Read 1335 times)
KC2BAZ
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Posts: 4




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« on: January 10, 2011, 03:19:07 PM »

i bought a tpl uhf amp model pa6-1fe its tuned for 468.25 can someone please tell me how to get it on the ham bands thanks 73s ...
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AD4U
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Posts: 2157




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« Reply #1 on: January 10, 2011, 04:30:47 PM »

Are there any adjustable caps in the amp?  If not the amp cannot be adjusted into the HAM band without removing and replacing components.  If there are mica compression caps that can be adjusted, then you may be able to do it.  On the other hand, UHF amps often have a rather wide operating range.  Carefully try it in the HAM band and see what happens.

Dick  AD4U
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KC2BAZ
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« Reply #2 on: January 10, 2011, 04:54:31 PM »

yes the amp has adjustments but im not sure what ones to turn or the tuning process thx for the help..
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K6AER
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« Reply #3 on: January 10, 2011, 06:11:39 PM »

The TPL amplifiers are banded. Basically you tune for maximum output but the uncased unelcos will need some additional capacitance to move it to the lower UHF band for ham operation. You can call TPL and they will tell you the values to use for padders. Ask for Lenny.
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