[MrFixr55]

Hi 462. My post just disappeared! A couple of questions:
Your Long Line Land Line, do u usually use this with 1930s vintage superhets or do you use it with TRFs also.

Is this your first TRF?
First TRF that uses 01As?
Are you using a 00 or a 01A in the detector stage? If using a 00, try a 01A. A 00 is more sensitive, but 01A is louder.

An interesting point that you made was that you had difficulty peaking and syncing the tuning caps.

Try the following.

Replace the Detector grid leak with a 3 MOhm Resistor. Replace the Detector grid Capacitor with a 250 pF (0.00025 uF) Cap. replace the Detector "Phone" cap with a 100pF (0.0001) uF Cap. Use an 01A in the detector.

If you have a '112A tube, us that in the output stage.

Per previous comments from a Phorum expert, if you have a good 6VDC Power supply of about 2A or greater, substitute the 5VPS with that. If you have 8 D Cells, hok them up in series parallel. They won't last long but should last a couple of hours.

Line up the tuning caps so that at 100 on the scale, all 3 tuning caps are fully meshed.
Connect your signal generator to the junction of the detector tuning cap and the detector grid cap. Set the frequency to a clear spot around 1200KHz, turn the modulator on and adjust the attenuator for minimum but hearable signal. "Rock" the dial till maximum signal is heard.

Adjust the "detector rheostat" (the one on the right) by lowering it till no signal is heard, then raising it till there is no improvement in volume. Retain all these settings and document scale reading on tuning dial.

Connect the signal generator to the junction of the tuning cap stator and the grid resistor of the rf RF Amp. without disturbing any settings. There should be a significant increase in volume of the signal. Lower attenuate the signal till the volume is low but can be heard. Lower the RF Amp filament rheostat (the one on the left) till the sound is minimized, then increase filament voltage to the RF amps till no further increase in volume is heard. "Rock" the dial as before. Attempt to sync the 3rd RF tuning cap (the one with the knob) with the detector tuning cap.

When peaked successfully, move the signal generator connection to the 2nd RF Tuning cap at the junction of the tuning cap stator and grid resistor. There should be significant increase in volume of the tone.

Repeat the "Rocking" procedure.

Leaving all settings the same, change the signal generator frequency to approximately 600KHz. Tune that frequency on the radio. If significantly louder, there may be an issue with one or more tubes in the RF Section.


Finally, connect to the antenna input. there should be increase in volume.

These radios are not loud by any stretch of the imagination. A 01A in the output stage at 90V produces only about 10mW. a 112A under the same conditions produces about 30 MW. a 112 at 135V B+ and -9V C- will produce 100 mW. For comparison, a pocket transistor radio produces 100 - 200 mW and an AA5 table radio produces 1000 -1500 mW.

I am under the weather today and have to finish projects for my job, as I retire this Friday. However, ASAp, I will pull out my AK35 and play with it for comparison.

Best Regards,
John, MrFixr55