08-07-2016, 07:51 PM
Ok so what will happen if you use the spkr as is is it will raise your HV a bit because it has a low dc resistance. We don't know what the inductance is which will affect it ability to filter out 60cy hum so you may have to increase the value of your second filter cap. The high B voltage probably not enough to worry about.
The dc resistance of the output transfromer doesn't mean much what does is the ac impedance. Since it is designed to match the plate impedance of the 42 tube (7000 ohms) to the philco spkrs voice coil your all set. You don't need to change it.
Sorry abt ur license. If you have a current one w/another call you may be able to get ur old call back though the vanity call sign program. If you have been expired for a good while ( I think the rule is 2 yrs) you have to take the test over again. QRZ has a service that you can sign up for (free) and they will send you an email a few months before you expire (license that is not you the person).
GL
The dc resistance of the output transfromer doesn't mean much what does is the ac impedance. Since it is designed to match the plate impedance of the 42 tube (7000 ohms) to the philco spkrs voice coil your all set. You don't need to change it.
Sorry abt ur license. If you have a current one w/another call you may be able to get ur old call back though the vanity call sign program. If you have been expired for a good while ( I think the rule is 2 yrs) you have to take the test over again. QRZ has a service that you can sign up for (free) and they will send you an email a few months before you expire (license that is not you the person).
GL
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
