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VHF transistor for HF Power ampli

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Theo

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Oct 17, 2012, 5:49:08 PM10/17/12
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HI,

I've several VHF transistor that could run about 50W.
I wonder if they are able to work under 3,5, 7 or 14 MHz ?

Thanks a lot for your answers

Teo

atec77

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Oct 17, 2012, 7:26:16 PM10/17/12
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Perhaps , depends on what the device is

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Arid ace

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Oct 17, 2012, 11:08:58 PM10/17/12
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Generally, a transistor designed for VHF will work well on HF, and with (much)
higher gain. When that is ignored, it could be a reason for instability though.

Jan

Theo

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Oct 18, 2012, 3:14:50 AM10/18/12
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hi,

Thanks a lot for your answers.

For a long time, I've :
BLY94 50W
2N5643 40W
BLY21 15W
2N5591 5W
2N5945 4W
2N3927 20W
MRF238 30W

I never use them in vhf but they can help me to build amplifiers for my qrp.

kkh...@yahoo.com

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Apr 22, 2013, 12:10:19 AM4/22/13
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Hi Everybody

I would like to make a CW Tansmitter, say 20 W, higher HF (25 MHz or more) for fishing boat. Is there any idea where I can find circuit and kits. Someone with experience in this field would be able to advise effectively. Your help would be very much appreciated.

Regards

Kazi
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