|
Post by champo on Oct 6, 2021 13:27:09 GMT -5
I have a Regency Range Gain that is in excellent condition and freshly recapped. The resistance at the tube pins is spot on and the only resistors with issues were the two at the caps and the 27ohm resistor that runs from the bridge rectifier to the cap; which was blown. All were replaced and the radio is operating correctly with the exception of it only modulates to about 3 watts PEP and not the 10+ watts. I've tried new 6AQ5 tubes as well as a new 12BH7 with no change. It keys a little over 1 watt. It is off frequency a tad ( 27.2037 as opposed to 27.2050). I confirmed steps 2 and 3 of the transmit alignment were correct but I am unable to do 1 because I do not have a sweep generator or a scope. For step 4 I am able to calibrate the meter but I don't have an RF voltmeter to complete the second half of step 4. Step 1 is the bandpass adjustment and step 4 is the rf calibration. Is there a work around for the sweep generator and scope? What might I be missing? Are 1 and 4 enough to cause what I'm seeing?
The voltages at the 6AQ5 tube pins ( V9 and V10) are spot on. There are some issues with the 12BH7 final tube values though. Here are the numbers for it. The first number is the value in the Sam's. The second value is what I have.
12BH7 Pin 1 180vdc : 145vdc Pin 2 -18vdc : +10vdc Pin 3 15vdc : 9vdc Pin 6 13vdc : 14vdc Pin 7 160vdc : 166vdc Pin 8 180vdc : 200vdc
I'm not sure if this is important or irrelevant to my issue. Thanks!
|
|
|
Post by narfedwards2 on Oct 7, 2021 6:44:09 GMT -5
I did a full rebuild on a Imperial and yes 5-6 watts is max rf out i can achieve.I think Gregg Howe can get 10W+ out of them.How I do not know.
|
|