I have committed on the purchase of the HT-9. I also bought the 20m tuning unit that was available online. Thanks to those of you that pointed me to this item!
I¡¯m not sure how much AM activity there is on 20m but at least it may give me a hint of what I need to fabrication the lower frequency tuning units. I would have thought there would have been more info out there in QST, HRM, CQ and handbook publications to fabricate this stuff. I wonder why it¡¯s not available. I¡¯ve got a good supply of coil stock and with the fabrication of a connector bar don¡¯t think I will have much trouble with making workable tank coils.?
I also bought a second HT-9 along with the clean one. It¡¯s also clean but has some modifications including non-Hallicrafters components mounted in the front panel. It does have nearly a full set of tubes, original Hallicrafters meters and what looks like original iron. That is a great source of extras (at the cost of shelf space and weight).LOL
There is some references on the use of the HT-9 in WW2. This tx was apparently developed in 1939 and our country was ill prepared for a world war so was caught short on a lot of stuff before we got up to speed shifting our industries into the war business.
I¡¯ll continue to pester the ham radio community searching for 75m and 40m coils and tuning units so I can put this old gal on the air.
Thanks,
Tom n5ama