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Ordering crystals for a rca bta-1r transmitter




 
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Author Topic: Ordering crystals for a rca bta-1r transmitter  (Read 1132 times)
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Ac8wp
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« on: July 08, 2019, 03:23:00 PM »

Hello all, I wanted to order crystals for a bta-1r transmitter and I was wondering if anyone knew anything about the required load capacitance ( if it has one). I know a vfo can be used instead however I wanted it to be rock bound.
Thanks
AC8WP
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DMOD
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« Reply #1 on: July 09, 2019, 08:56:26 PM »

Counting the tube's input capacitance and the BTA's warping cap, it is ~ 30 pF.


Phil - AC0OB
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Detroit47
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« Reply #2 on: July 09, 2019, 11:15:43 PM »

Where are you going to order rocks from?

Johnathan N8QPC
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KA3EKH
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« Reply #3 on: July 11, 2019, 08:22:35 AM »

I ordered rocks from AF4K, just used regular HC6/U for 1885 and had no issues. That was for my RCA BTA-1M.
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DMOD
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« Reply #4 on: July 11, 2019, 10:18:56 PM »

If you need some rocks that Bry doesn't have, try www.quartslab.com.

Phil - AC0OB
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