[NJARC] Knight KX-60 Amplifier

[Mike Feher]

Chuck -

Even without going downstairs, which I try to avoid nowadays, I found some
2N4398s by Motorola that are NOS. These are TO-3 PNPs but silicon. I am sure
they will work just fine in that circuit. You can pick them up, or, I can
mail them to you. Here is the data sheet. 73 - Mike

http://www.nteinc.com/specs/original/2N4398_99.pdf 

Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960 


-----Original Message-----
From: Chuck [mailto:cpaci1 at verizon.net] 
Sent: Friday, June 10, 2016 11:09 AM
To: Mike Feher; 'Al Klase'; njarc at mailman.qth.net
Subject: Re: [NJARC] Knight KX-60 Amplifier

Thank you Mike.
You have been a great help!
And -- I would be more than happy to pay for those transistors.
See you tonight at the meeting.
Thanks again!!!!!!!
Chuck

-----Original Message-----
From: Mike Feher
Sent: Friday, June 10, 2016 10:57 AM
To: 'Chuck' ; 'Al Klase' ; njarc at mailman.qth.net
Subject: RE: [NJARC] Knight KX-60 Amplifier

If I find a couple you can have them. I just have to go downstairs and
check, but, I know I have them. They are really not that critical as the
voltages on all three junctions is essentially the same. Your only real
criteria is that they be PNP in a TO-3 style package. Even NPNs would work,
but would require some circuit topology of the PS to change. Even silicon
will work, giving you a few tenths of a volt less out. Will let you know as
I have thousands. 73 - Mike

Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960


-----Original Message-----
From: Chuck [mailto:cpaci1 at verizon.net]
Sent: Friday, June 10, 2016 10:09 AM
To: Mike Feher; 'Al Klase'; njarc at mailman.qth.net
Subject: Re: [NJARC] Knight KX-60 Amplifier

Hi Mike,
That sounds very plausible.
My experience with solid state is fairly limited and this power supply
circuit design is new to me.
If you do find a couple transistors that will work, I will buy them from
you.

Thanks Mike...
Chuck

-----Original Message-----
From: Mike Feher
Sent: Friday, June 10, 2016 7:16 AM
To: 'Chuck' ; 'Al Klase' ; njarc at mailman.qth.net
Subject: RE: [NJARC] Knight KX-60 Amplifier

Chuck -

I believe on this case the transistors are acting as C multipliers using the
Miller effect. The diodes are doing the rectification. I have lots of PNP
power Ge transistors. 73 - Mike

Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960

-----Original Message-----
From: NJARC [mailto:njarc-bounces at mailman.qth.net] On Behalf Of Chuck
Sent: Friday, June 10, 2016 4:40 AM
To: Al Klase; njarc at mailman.qth.net
Subject: Re: [NJARC] Knight KX-60 Amplifier

Just remember
Reply = Poster
Reply All = Everyone

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