[Heath] Fwd: Fwd: Final transistors for SB 104A

[Chris Iwata]

-------- Forwarded Message --------
Subject: 	Re: [Heath] Fwd: Final transistors for SB 104A
Date: 	Wed, 22 Sep 2021 12:56:01 -0700
From: 	Chris Iwata <chrisiwata at aol.com>
To: 	ka9dzr at aol.com




If you luck out and find some,  bear in mind that you have to buy 
matched pairs.

Theoretically, you have to buy matched quads.  But you can probably be 
OK with matched pairs

Expect to pay a premium, those  stud mount RF transistors haven't been 
made for at least 20 years. A guess would be at least $50 each

Your best bet is to buy a junked SB104

The SB104 will become unrestorable due to unavailability of the Final 
transistors, the Nixie tubes, the Nixie driver IC, and the voltage 
regulator IC.

Chris, KL7DM



On 9/22/2021 10:18 AM, ka9dzr--- via Heath wrote:
> has anyone fine any replacement finals for the sb-104a yet  tnx ka9dzr 
> Dennis
>
>     ------------------------------------------------------------------------
>     From: heath at puck.nether.net
>     To: heath at puck.nether.net
>     Sent: 11/24/2014 4:56:23 PM Central Standard Time
>     Subject: [Heath] Final transistors for SB 104A
>
>     I have learned that the 2n6456 final RF transistors are no longer
>     available and I NEED to replace the four (4) in a Heath SB 104A.
>     Has anyone found a suitable replacement transistor for this
>     application? I have thoroughly checked with RF Parts and they no
>     longer stock those transistors.
>     Does anyone have experience substituting the final transistors in
>     the SB 104A? If so what did you use as a replacement  and do you
>     know where they can be found? Thanks and 73, John, K5PGW
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