[ARC5] BC-946

[WA5CAB--- via ARC5]

Heater power consumption is 50% higher if memory serves.  You can't run it 
in series with a 6SR7 (or 6SQ7) without a parallel resistor to pass the 
extra current.

In a message dated 04/29/2014 23:35:07 PM Central Daylight Time, 
ianmwilson73 at gmail.com writes: 
> Well, 5k primary speaker transformers were more readily available than
> others, so it wouldn't surprise me if you might get 2x the audio power 
> from
> a 6V6 setup than a 12A6 one *using a 5k output transformer and running
> on 250v*. This would be a whopping 3dB :)
> 
> 73, ian K3IMW
> 
> 
> 
> On Tue, Apr 29, 2014 at 1:55 PM, D C _Mac_ Macdonald <k2gkk at hotmail.com>
> wrote:
> 
> >BFD - all of ~1.09 dB more output!
> >
> >* * * * * * * * * * *
> >* 73 - Mac, K2GKK/5 *
> >* (Since 30 Nov 53) *
> >* k2gkk hotmail com *
> >* Oklahoma City, OK *
> >* USAF &FAA (Ret.) *
> >* * * * * * * * * * *
> >
> >
> >
> >>Date: Tue, 29 Apr 2014 13:21:04 -0700
> >>From: ianmwilson73 at gmail.com
> >>To: vk2bcu at operamail.com
> >>CC: arc5 at mailman.qth.net
> >>Subject: Re: [ARC5] BC-946
> >
> >>
> >>Possibly not the reason for the substitution, but the 6V6 has higher
> >>plate dissipation and can provide more audio power (4.5W with a
> >>plate load of 5k) compared to the 12A6 (3.5W / 7.5k) with 250V
> >>supplies.
> >>
> >>(When I was looking for alternative tubes to use in a Paraset
> >>lookalike, I hoped the 12A6 was the answer - but you can squeeze
> >>quite a bit more RF power out of a crystal-controlled self-oscillating
> >>6V6 than a 12A6).
> >>
> >>73, ian K3IMW

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480