Upgrade SB-301

[Ed Gardner]

Thanks for the info Stu. I'll see about trying that with mine.

No virus. The gunk at the bottom is my PGP encryption public key. If you
use PGP you can use my public key to send me encrypted email, then I
decrypt it with my private key. VERY SECURE!!

tnx es 73.

Stu Lyon wrote:
>
> Been there, done that. Found that a 6HS6 is a better choice for the 2nd
> mixer. I tried a 6AH6 in the 1st mixer. The best thing you can do for a
> SB-301 is replace the 6BZ6 in the RFAmp with a 6GM6. Using a figure-of-merit
> of gm/Rn, the 6GM6 is about 2.5 times "better" than a 6BZ6.
>
> I tried the following line-up in my SB-301:
> 6GM6 - RfAmp: 6AH6 - 1st mix.: 6HS6 - 2nd mix.: 6HR6 - 1st IF. (6AU6 - 2nd
> IF).
> All this was mostly an exercise in how hot I could make the set without
> turning it into a big oscillator. The set was really "hot" but all receiver
> theory tells us that the sensitivity comes from the 1st stage. What we need
> here is something with reasonable gain and low noise - and that's what the
> 6GM6 does. All the rest just makes the S-meter read higher.
>
> After all this tube switching, I also ended up with some very hot fingers.
>
> 73, Stu W6CUX
> Winnetka, CA
> ARRL Life Member
>
> Ed, what was all that garbage hung onto the back of your message?? Something
> about "public key block". Hope you didn't give me a virus. Stu
>
> ----- Original Message -----
> From: "Ed Gardner" <egardner at TWCNY.RR.COM>
> To: <HEATH at LISTSERV.TEMPE.GOV>
> Sent: Thursday, September 14, 2000 6:08 PM
> Subject: Re: SB-101 Factory Mod to Upgrade Receiver
>
> > Anyone know if this mod will work on the SB-301? Its got 6AU6's in the
> > first and second mixers.
> >
> > Ed

--
Edward Gardner
KC2BYA, FISTS #6940
NNN0BDP NAVMARCORPMARS
------------------------------------------------
We have no government armed with power capable of
contending with human passions unbridled by morality
and religion. Avarice, ambition, revenge, or gallantry,
would break the strongest cords of our Constitution as
a whale goes through a net.  Our Constitution was made
only for a moral and religious people.  It is wholly inadequate
to the government of any other.

                        - John Adams, Oct.11, 1798
                          Address to the military

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