[National] SW-3 Questions
 

Hi Roger,

"Roger D Johnson" wrote in message
...
The SW-3 I recently acquired has all sections of the voltage
divider open! I have the values of the individual sections but
not sure how they are arranged. It appears that the 6900 Ohm
section goes to B+ and then thru the 2000 Ohm section and 3100
Ohms to ground.

That is correct according to a diagram in a James Millen article for the
"All-A.C. Version of the Receiver" QST, unknown date.


My receiver is set up for 2.5 volt filaments and I would like
to operate it from 6 volts. Half the sites I visit say the 6C6
is the sub and the other half says 6D6! Which is the better
choice?

The SW-3 Model II used 58, 58, 56 (2.5 volt) or 6C6, 6C6, 76 (6.3 volt)
tubes interchangeably. This version used "30-40" series coils.

73 de Bill, AB6MT





Thanks and 73, Roger N1RJ
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[National] SW-3 Questions
 

Hi Roger,

Regarding the tubes, I now see what you mean. The SW-3 here contains 6D6
tubes.

"Roger D Johnson" wrote in message
...
The SW-3 I recently acquired has all sections of the voltage
divider open! I have the values of the individual sections but
not sure how they are arranged. It appears that the 6900 Ohm
section goes to B+ and then thru the 2000 Ohm section and 3100
Ohms to ground.

My receiver is set up for 2.5 volt filaments and I would like
to operate it from 6 volts. Half the sites I visit say the 6C6
is the sub and the other half says 6D6! Which is the better
choice?

Thanks and 73, Roger N1RJ
--
Remove tilde (~) to reply

Remember the USS Liberty (AGTR-5)
http://ussliberty.org/
_______________________________________________
National mailing list

http://mailman.qth.net/mailman/listinfo/national

SW-3 Questions
 

The SW-3 I recently acquired has all sections of the voltage
divider open! I have the values of the individual sections but
not sure how they are arranged. It appears that the 6900 Ohm
section goes to B+ and then thru the 2000 Ohm section and 3100
Ohms to ground.

My receiver is set up for 2.5 volt filaments and I would like
to operate it from 6 volts. Half the sites I visit say the 6C6
is the sub and the other half says 6D6! Which is the better
choice?

Thanks and 73, Roger N1RJ
--
Remove tilde (~) to reply

Remember the USS Liberty (AGTR-5)
http://ussliberty.org/

SW-3 Questions
 

"Roger D Johnson" wrote in message
...
The SW-3 I recently acquired has all sections of the voltage
divider open! I have the values of the individual sections but
not sure how they are arranged. It appears that the 6900 Ohm
section goes to B+ and then thru the 2000 Ohm section and 3100
Ohms to ground.

My receiver is set up for 2.5 volt filaments and I would like
to operate it from 6 volts. Half the sites I visit say the 6C6
is the sub and the other half says 6D6! Which is the better
choice?


Neither, use a 77 or 78.

John H.

SW-3 Questions
 

Roger D Johnson wrote:
The SW-3 I recently acquired has all sections of the voltage
divider open! I have the values of the individual sections but
not sure how they are arranged. It appears that the 6900 Ohm
section goes to B+ and then thru the 2000 Ohm section and 3100
Ohms to ground.

My receiver is set up for 2.5 volt filaments and I would like
to operate it from 6 volts. Half the sites I visit say the 6C6
is the sub and the other half says 6D6! Which is the better
choice?

Thanks and 73, Roger N1RJ
You are correct on the resistor order. This agrees with an SW58
schematic I found.