[Hallicrafters] SX-28: Fast HT rise - long term stress on thereceiver's tubes?

[Carl]

Cathode stripping is more myth than fact as shown by the long tube life in 
all sets of the era minus the AC/DC versions. Auto radios are other examples 
with 0Z4's and synchronous vibrators.
In later years SS rectifiers were factory standard.

Carl
KM1H





----- Original Message ----- 
From: "jeff" <vortex6066 at yahoo.com.au>
To: <hallicrafters at mailman.qth.net>
Sent: Saturday, September 11, 2010 11:58 PM
Subject: [Hallicrafters] SX-28: Fast HT rise - long term stress on 
thereceiver's tubes?


> Hi,
> Ive been wondering if the quick rise-time of the HT (4 secs?) due to the 
> directly heated 5Z3 can cause cathode stripping of the other receiving 
> tubes which are slower to warm up, and therefore reduce the working life 
> of those tubes?
>
> I havent had my SX-28 long enough to know if tube life is possibly shorter 
> than it should be due to this.
>
> Id appreciate comments on this.
> regards,
> JEFF
> ZL3JK
>
>
>
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