Hallicrafters HT-32A Transmitter.
The final product of about 3 months work to restore and make operational this vintage HT-32A.
More details of the restore will be added in the future.
More details of the restore will be added in the future.
Opening the case found so much mouse nesting material that it took several hours to get the large debris removed.
I brought the transmitter inside from the winter garage temperature and let it slowly defrost for several days. Nothing worse than going from a near zero temp to the comfortable indoor living conditions for these old relics.
About now, 4 days had passed since bringing the HT-32A inside. The dew that formed from the temp change has dissipated and now it was time to bring it to my work bench. Here I will check as many resistance readings as I can and hope for the best. Not having to apply AC power, I can let the unit sit and continue defrosting while I do my resistance checks. Luck was with me that I actually had the original manual and most of the modifications that were made over the years were recorded in the manual.
Off hand I decided to check the tubes while I had the borrowed tube tester handy. Several tubes were marginal on the mutual conductance tester. Searching the internet, I found a source for the tubes needed and decided to replace all that could be obtained. The 6146 finals were replaced with donations from a long time friend. I did find six, 6146B's, online at a very reasonable cost. I matched them as closely as possible and marked them in pairs. I did insert the two best matched tubes as finals after I got the transmitter operating and aligned.
Again I let the HT-32A fire up slowly. Just like I did the SX-101A.