The last four I bought came from Henry Radio.
Rfparts sell them as well.
https://www.rfparts.com/catalogsearch/result/?q=mrf454
73
Peter, DJ7WW
-----Original Message-----
From: Carl [mailto:km1h@jeremy.qozzy.com]
Sent: Montag, 1. Mai 2017 20:55
To: Peter Voelpel; 'Jim Thomson'; amps@contesting.com
Subject: Re: [Amps] Ham Tests, was Price per Watt Conversation
If you can find a real matched pair and not Chinese trash.
----- Original Message -----
From: "Peter Voelpel" <dj7ww@t-online.de>
To: "'Jim Thomson'" <jim.thom@telus.net>; <amps@contesting.com>
Sent: Saturday, April 29, 2017 2:56 AM
Subject: Re: [Amps] Ham Tests, was Price per Watt Conversation
> MRF458 and MRF 454 transistors are still available and you can also use
> 2SC2879.
>
> 73
> Peter, DJ7WW
>
> -----Original Message-----
> From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Jim Thomson
>
> <I wouldn't worry too much about transistors becoming unobtainable
> <because equivalents will nearly always be available. Compared to
> <tubes, transistors don't have nearly as many physical variations and
> <many of the later ones will be drop-in replacements. Not so much with
> <tubes without replacing sockets and re-wiring.
>
> <In either case, where there's a will there's a way.
>
> <73, Bill W6WRT
>
> ## tell that to my buddy, who lives 5 blocks away from me. He has
> a ten-tec hercules SS 500 watt amp. Transistors are un obtainium.
> There is no drop in replacement either. There is no way to even re-design
> and rebuild the damned thing. Its a door stop, worth nothing. Nobody
> has been successful in getting a TEN TEC Hercules to work. They
> are all door stops.
>
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