[Texasrocker]

I have had success adding loop antennas on many older radios to receive the local stations only. I always keep a good stock of scavaged loop antennas from garage-sale $1 bargain late 50s-60s tube radios that also yield a few good small size pm spkrs and miniature tubes as well. The best way to find out if a loop antenna will work with the older radios is by experimenting with a few different ones, and by rotating them in different directions using only one connector from the loop antenna jump-wired into the main orig outdoor longwire antenna terminal on chassis of the vintage radio. Do not use the other antenna terminal back to chassis ground! That 2nd terminal on the modern loop antenna can be used to continue thru a .00025 mmf cap to your "added-isolated" fahnstock clip mounted somewhere inside the wood cabinet, or special built rear perforated rear radio panel isolated from the chassis, and a regular outdoor longwire antenna can also be attached with the modern loop in series by connection of the 2nd terminal of the modern loop type antenna. The .00025 mmf cap will help keep "antenna -overload" from happening in association with outdoor longwire also being added, but you may want to experiment with several different values mmf caps for best "balance" of the orig chassis tuned circuitry. The modern loop "added" will provide local reception only on the BC band, and if separate antenna terminals are provided for BC/Shortwave reception, always use your outdoor longwire for SW reception separate from BC antenna. Has worked for me before very well. Randal (TxRockr)