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Title: HT-37 Modulator driver transformers? Post by: KU8L on October 02, 2020, 12:27:56 PM Hi guys...I know the HT-37 can be used quite nicely for AM so will try this here.
Have a KP4 friend trying to get one back up and going but both mod driver interstage transformers are bad. He was going to get some standard audio output units to try but I thought that would not end well. I am thinking these should be small interstage river transformers like the one in the mod driver of a Elema AF-67/68. They take the plate output of the audio out driver and couple it to the balanced modulators. Anyone have any experience rplacing these with a generic driver trans? I thought Hammond has one usable in the elmac and that might be worth a try. Thanks Curt Title: Re: HT-37 Modulator driver transformers? Post by: DMOD on October 06, 2020, 12:58:11 PM You might want to upload the HT-37 schematic and tell us what transformers you are referring to. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
The HT-37 is not a plate modulated system, but uses a phasing system. DMOD |