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K3HVG ) writes:
Don, The manual can be found on the BAMA website. I have overhauled two HQ-120's and found that, on both, 100% of the capacitors had to be replaced, along with a few resistors. I have to say that after the re-capping, they now function extremely well. The HQ-120 was used by the Navy as the RBG-2 and, generally, had a large metal tag or screened label with the Navy nomenclature on it. The Navy version also had some ruggedized transformers in them. I'll also add that the HQ-120, and most other equipment from this era, like to be run on 110v. At 120v or higher, they can run very hot and cause stress. I use a 15A Variac on my "vintage line voltage bus" to keep things cool and calm. Good luck with your project. de Jeep/K3HVG But he's talking about a National NC-120, not a Hammarlund HQ-120. Maybe he's mixed up about the receiver he has, but that seems a stretge. Michael VE2BVW Don wrote: I am restoring a National NC-120 receiver. I understand this type was used by the US Navy during World War 2. I need a repair manual with test information such as tube socket voltages and a schematic with component values. One similar to the ones I have for my BC-348 R and Bendix RA-1B that has pictorial drawings of component placement and arrangement of wiring would be great. Also any advice from anyone with experience with this model will be appreciated. So far I have found the power supply voltage to be about 220 DC and all the tubes test OK, but some of the socket voltages seem wrong to me but I am not a radio tech. The radio was working and just faded out. Thanks Don VE1DLT |
#2
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Wooops..... Wrong radio!!!!
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