02-12-2018, 09:41 PM
I've restored both a 40-130 and the similar 40-145 and unfortunately (or fortunately) have not encountered the problem you are describing in either of them.
So after rewinding the OSC and RF coils, no change was noticed in the symptoms? It didn't get worse or better? Did you check over / clean your tuning capacitor? No bent fins? Did you replace the rubber mounts under it?
You may want to try different 7A8 & 7C7 tubes. Even though they're new they may still cause problems. Those Loctal sockets are prone to poor connections. Clean the sockets thoroughly and clean the tube pins too. I sometimes have to scrape the pins with a safety knife to get a good connection. They can develop corrosion just from sitting in the box if they're NOS.
You may have already done these things but just throwing them out there as things to try.
So after rewinding the OSC and RF coils, no change was noticed in the symptoms? It didn't get worse or better? Did you check over / clean your tuning capacitor? No bent fins? Did you replace the rubber mounts under it?
You may want to try different 7A8 & 7C7 tubes. Even though they're new they may still cause problems. Those Loctal sockets are prone to poor connections. Clean the sockets thoroughly and clean the tube pins too. I sometimes have to scrape the pins with a safety knife to get a good connection. They can develop corrosion just from sitting in the box if they're NOS.
You may have already done these things but just throwing them out there as things to try.
Greg V.
West Bend, WI
Member WARCI.org
