In general, bipolar transistors are about the easiest to substitute RF
devices we have at our disposal. That doesn't mean there are
substitutes for all specific installations, or every transistor.
Typically we need to find a transistor with similar characteristics with
equal or higher power handling capabilities.
With ham gear, it's often easy to match, or come close in
characteristics, only to find they won't fit.
When substitutes are available, don't go for higher gain, or higher
frequency capability.
I'm not up on the newer FETs., MOS FETs, etc as I've done no design work
in those areas.
If anyone can find one, Heathkit put out a series of semiconductor
courses in large, white notebooks. That were great I used the whole
series at work, but unfortunately several have disappeared. I probably
loaned them, or possibly thought I'd never use them again.
I taught the trades at least several years before I left that company
ion 87 so it was at least 85, or possibly 84. so 32 years, give or
take. Bipolar theory hasn't changed so those books would still be
relevant.
73
Roger (K8RI)
On 2/22/2016 Monday 11:48 AM, Ron Youvan wrote:
Paul KW7Y Baldock wrote:
Does anybody know of a RELIABLE supplier for the obsolete RD16HHF1
transistor?
Not obsolete, "RF Parts" sells them for $$4.75 each.
Possibly replaceable with several other RF Trans.
https://www.rfparts.com/rftransistors/transistor-rd/rd16hhf1.html
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