Thanks again, John. You could very well be right about the voltage of
the coils. The only thing I have to go by until I receive the schematic
is the previous model (BTA-1R1) schematic and the relays used for the
same purpose in it are totally different. They are 4PDT and operate on
115 vac.
I am looking to replace these relays. They are the relays that
determine the crystal choice in the RCA BTA-1R2 broadcast transmitters.
I appreciate the help and advise.
73,
Rick/K5IZ
John E. Coleman (ARS WA5BXO) wrote:
My guess is that the relay coil current is around than 10ma. If it
is around 10ma then the voltage would be 24VDC giving it a heat dissipation
of .24 watts. This seems all very feasible to me and it may work with as
little as 12 Volts.
Are you looking for a replacement or are you just trying to get the
specification to use the relay for some other purpose. If looking for a
replacement and you can measure the resistance of the coil then I wonder
what is wrong with the relay. Maybe the mechanism is damaged in some way?
There were some latching relays that were used in remote control TVs
a long time ago. They were a kind of rotary thing and every time the relay
coil was energized the relay would go to the next position for a volume
advance. There were generally 4 positions and the forth was POWER OFF.
These were low voltage DC coils which ran from a 20 Volts or less source.
