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G3VKM_Roger · 27th Jun 2019, 7:08 am

Hello Pete,

I've seen a similar arrangement for the American TCS transmitter. Originally, the TX was used on small craft with a 25ft whip antenna and a tapped loading coil at the TX output. When they wanted to use the TCS on larger ships a coax run was needed to the antenna, so they changed the RF out binding post for a N or UHF socket and used a capacitor box at the TX end which could switch combinations of fixed mica caps until a match was achieved. Of course, one could do the same with a pair of tuning caps.

I use a dummy load to tune my vintage TXs into, then switch from the D/L to a Smartuner and a 100ft inverted L with 6 buried 33ft radials in the back lawn. Not ideal but it gets out on most bands

73

Roger/G3vKM

27th Jun 2019, 7:08 am	#6
G3VKM_Roger Heptode Join Date: Jun 2012 Location: Southeast Norfolk, UK. Posts: 773	Re: Ex marine AM radio equipment. Hello Pete, I've seen a similar arrangement for the American TCS transmitter. Originally, the TX was used on small craft with a 25ft whip antenna and a tapped loading coil at the TX output. When they wanted to use the TCS on larger ships a coax run was needed to the antenna, so they changed the RF out binding post for a N or UHF socket and used a capacitor box at the TX end which could switch combinations of fixed mica caps until a match was achieved. Of course, one could do the same with a pair of tuning caps. I use a dummy load to tune my vintage TXs into, then switch from the D/L to a Smartuner and a 100ft inverted L with 6 buried 33ft radials in the back lawn. Not ideal but it gets out on most bands 73 Roger/G3vKM