[ARC5] 10 meter BC-454 - Drift.

[Geoff]

I havent used a VR tube as a replacement or in a project in probably 20 
years. In commercial gear it is a one wire reconnect to put it back to 
original for the next owner.


----- Original Message ----- 
From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
To: "Geoff" <geoffrey at jeremy.mv.com>
Cc: <Arc5 at mailman.qth.net>
Sent: Friday, March 08, 2013 11:46 AM
Subject: Re: [ARC5] 10 meter BC-454 - Drift.


> On 7 Mar 2013 at 21:22, Geoff wrote:
>
>> All that does is somewhat stabilise for power surges but gas
>> regulators arent that quick at times
>
> Yes, and they can oscillate, and they take up a lot of room, and they get
> hot...but they are so purty. :-)
>
>> and the filament is still
>> affected.
>
> Yes, but those effects are a lot slower.
>
>> Zeners are mo betta or just DC regulate everything with
>> serious SS. Those are still just short term attempts where long term
>> drift is much more annoying.
>
> Yes, but stabilizing the voltage will eliminate some of the mechanical
> instability.
>
> I checked Mouser and 5 and 10 watt Zeners are really, really cheap and 
> take
> up a heck of a lot less room than VR tubes....but they are so darned ugly.
>
> Still, the power supplies I have here for the receivers are pretty 
> compact, so I
> may just go with Zeners anyway. It would sure be simpler.
>
> Might as well make the power supplies as capable as possible. It will come 
> in
> handy down the road.
>
> Ken
>
>
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