[ARC5] BC-375 Re-Tube Project- Scratch Three

[Geoff]

And then there is also the 809, T-40 and T-40Z, all of which are fairly 
available.

Carl


----- Original Message ----- 
From: "Geoff" <geoffrey at jeremy.mv.com>
To: <kgordon2006 at frontier.com>; "David Stinson" <arc5 at ix.netcom.com>; "ARC-5 
List" <arc5 at mailman.qth.net>
Sent: Monday, November 18, 2013 4:02 PM
Subject: Re: [ARC5] BC-375 Re-Tube Project- Scratch Three


> What about an 811 or 812, A or non A?
>
> Carl
>
>
> ----- Original Message ----- 
> From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
> To: "David Stinson" <arc5 at ix.netcom.com>; "ARC-5 List" 
> <arc5 at mailman.qth.net>
> Sent: Monday, November 18, 2013 11:47 AM
> Subject: Re: [ARC5] BC-375 Re-Tube Project- Scratch Three
>
>
>> On 18 Nov 2013 at 3:10, David Stinson wrote:
>>
>>> Three candidate tubes for the
>>> "Cheap Tubes for the BC-375" project have disappointed.
>>> 1625, 837 and 7984 will not "hold up" in this service.
>>> Once the screen voltages are dropped to spec,
>>> the tubes lack the gain to oscillate reliably, even
>>> with heavy "gimmick" cap coupling between grid
>>> and plate in the OSC stage.
>>
>> David: Have you yet tried connecting the screen to the GRID (G1). As I 
>> said
>> earlier, this results in a HIGH-MU triode, which SHOULD work much better
>> as an oscillator.
>>
>> Kenneth G. Gordon W7EKB
>>
>> "Courage is being scared to death but saddling up anyway."--- John 
>> Wayne
>>
>> ______________________________________________________________
>> ARC5 mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/arc5
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:ARC5 at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>> -----
>> No virus found in this message.
>> Checked by AVG - www.avg.com
>> Version: 10.0.1432 / Virus Database: 3222/6346 - Release Date: 11/18/13
>>
>