1920s radio

[Paul Drahn]

On 8/29/2019 5:16 AM, pfjw@aol.com wrote:

On Wednesday, August 28, 2019 at 11:55:29 AM UTC-4, Phil Hobbs wrote:

Probably intended for a 67 V B battery.

Cheers

Phil Hobbs


'Ideal' B+ voltage is determined by the specific tube installed.

Peter Wieck
Melrose Park, PA

I built a two tube radio about 20 years ago using 01A tubes. I put 5
regular 9 volt batteries in series to give 45 volts for the radio.
Worked fine.

You know you can plug the 9 volt batteries + to - using the connectors
on top?

Paul

 

On Thursday, 29 August 2019 17:56:39 UTC+1, Paul Drahn wrote:

On 8/29/2019 5:16 AM, pfjw@aol.com wrote:
On Wednesday, August 28, 2019 at 11:55:29 AM UTC-4, Phil Hobbs wrote:

Probably intended for a 67 V B battery.

'Ideal' B+ voltage is determined by the specific tube installed.

I built a two tube radio about 20 years ago using 01A tubes. I put 5
regular 9 volt batteries in series to give 45 volts for the radio.
Worked fine.

You know you can plug the 9 volt batteries + to - using the connectors
on top?

Paul

Not a bad idea. They'd last ages too.


NT

 

[Cursitor Doom]

On Thu, 29 Aug 2019 22:42:01 -0700, tabbypurr wrote:

> Not a bad idea. They'd last ages too.

They sure would. Their combined internal resistances would see to that;
law of diminishing returns and all that. You really need to establish
what the likely anode current will be.
Amazing what they did with just one tube, though! Got to admire the
resourcefulness that went into such designs.



--
This message may be freely reproduced without limit or charge only via
the Usenet protocol. Reproduction in whole or part through other
protocols, whether for profit or not, is conditional upon a charge of
GBP10.00 per reproduction. Publication in this manner via non-Usenet
protocols constitutes acceptance of this condition.

 

On Sunday, 1 September 2019 18:52:23 UTC+1, Cursitor Doom wrote:

On Thu, 29 Aug 2019 22:42:01 -0700, tabbypurr wrote:

Not a bad idea. They'd last ages too.

They sure would. Their combined internal resistances would see to that;
law of diminishing returns and all that. You really need to establish
what the likely anode current will be.

2-3mA. PP3s can kick out over 100mA.

Amazing what they did with just one tube, though! Got to admire the
resourcefulness that went into such designs.

Oh yes. Resourceful was the name of the game for a long time, now that silicon's cheap few care about efficiency or smart tricks.


NT

 

On Sunday, September 1, 2019 at 7:38:46 PM UTC-4, tabb...@gmail.com wrote:

On Sunday, 1 September 2019 18:52:23 UTC+1, Cursitor Doom wrote:
On Thu, 29 Aug 2019 22:42:01 -0700, tabbypurr wrote:

Not a bad idea. They'd last ages too.

They sure would. Their combined internal resistances would see to that;
law of diminishing returns and all that. You really need to establish
what the likely anode current will be.

2-3mA. PP3s can kick out over 100mA.

Amazing what they did with just one tube, though! Got to admire the
resourcefulness that went into such designs.

Oh yes. Resourceful was the name of the game for a long time, now that silicon's cheap few care

Maybe "graphene" seems slated as a pseudo-silicon replacement at that, too.