[Hallicrafters] The 8122, 6146, 6HF5, and 6KD6 Enigma

[Charlie T, K3ICH]

The 1N4000's are silicon power diodes.  I believe the 1N459 might be a 
Zener.  The1N914's would work OK since it is a signal diode.  .  The 1N270's 
are also signal diodes but are Germanium and are electrically closest to the 
original 1N34's  I'd recommend the 1N914's though

73 Charlie k3ICH


----- Original Message ----- 
From: "Lee via Hallicrafters" <hallicrafters at mailman.qth.net>
To: <hallicrafterssr2000 at k9axn.com>; <hallicrafters at mailman.qth.net>
Sent: Saturday, March 14, 2015 11:49 AM
Subject: Re: [Hallicrafters] The 8122, 6146, 6HF5, and 6KD6 Enigma


>
> Jim, (or anyone)
> I am going to put in the ALC mod in the HT-32B soon....
> The article calls for 1N34A diodes....
>
> I have some:
> 1N4001
> 1N4002
> 1N4004
> 1N4005
> 1N4007
>
> 1N914
>
> 1N459A
> 1N270
>
> Will any of these work OK?
>
> 73,
> Lee
>
>
>
>
>
>
> -----Original Message-----
> From: Jim Liles <hallicrafterssr2000 at k9axn.com>
> To: hallicrafters <hallicrafters at mailman.qth.net>
> Sent: Thu, Mar 12, 2015 5:57 pm
> Subject: [Hallicrafters] The 8122, 6146, 6HF5, and 6KD6 Enigma
>
>
> The following information will help to understand why vacuum tubes behave 
> as
> they do.  We focus on the 8122 used in Class AB1 service as well as just 
> about
> any tube used under Class parameters.  What you’ll find is tubes like the 
> 6146,
> 6HF5, 6KD6, and others have the same frailties and strengths as the 8122.
>
> If
> you are restoring or servicing any vintage transmitter or transceiver you 
> will
> find the following link to be interesting and it will save you a good deal 
> of
> grief.  If nothing else, it will help to understand the idiosyncrasy's and 
> some
> times bizarre behavior of these tubes and how to cope with them.
>
>
> http://k9axn.com/_mgxroot/page_10868.html
>
> If it is unclear please send a note
> so we can correct the language.
>
> Kindest regards Jim
> K9AXN
>
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