This modification allows the squelch control to vary the power of the TS430s from a couple of watts to full power. The squelch control still operates on FM mode but is disabled on SSB. [ not very useful anyway.]
Remove top cover of transceiver. The main board on show is the IF unit. Locate socket 26, with front of set towards you socket 26 is to the left of the board about midway back to front.
Cut the wire to pin 6 leaving about 3cms wire on the plug. This wire is usually brown. The wire tail from the plug has to be connected to ground, This enables SSB receive, pin 4 is ground and can be used.
The brown lead you have just cut comes from the small PCB behind the squelch control. It runs to pin 6, socket 6 on this board. It is the end pin to your right looking from the front of the set. Pull this brown wire free of the harness so that you have a free lead from the plug.
Locate R211, a 1K resistor which connects the source of Q41 to ground. From the front of set.. right hand side, towards the front of the board. Cut the ground side of R211 leaving sufficient lead to solder to.
The ground side should be the top end of the resistor, but check. Take the brown lead from the squelch board, suitably shortened, to the resistor. The squelch control , SSB section, is now in series with R211 and gives excellent control over the RF output level. Replace cover. Job done.
In use, Maximum power is with the control fully anticlockwise.
With the squelch pot set anticlockwise and the set in CW mode, Transmit a carrier [ you will need to short the key jack] and set the carrier control for full power. You can then vary power on all modes using the squelch control.
Check the carrier control setting required for different bands, it will probably vary slightly between 160 and 10 metres. The protection circuits will still operate as before but if running low power the set will tolerate poor aerial matching without using the protection circuits.
Mod provided by G8BEQ
Remove top cover of transceiver. The main board on show is the IF unit. Locate socket 26, with front of set towards you socket 26 is to the left of the board about midway back to front.
Cut the wire to pin 6 leaving about 3cms wire on the plug. This wire is usually brown. The wire tail from the plug has to be connected to ground, This enables SSB receive, pin 4 is ground and can be used.
The brown lead you have just cut comes from the small PCB behind the squelch control. It runs to pin 6, socket 6 on this board. It is the end pin to your right looking from the front of the set. Pull this brown wire free of the harness so that you have a free lead from the plug.
Locate R211, a 1K resistor which connects the source of Q41 to ground. From the front of set.. right hand side, towards the front of the board. Cut the ground side of R211 leaving sufficient lead to solder to.
The ground side should be the top end of the resistor, but check. Take the brown lead from the squelch board, suitably shortened, to the resistor. The squelch control , SSB section, is now in series with R211 and gives excellent control over the RF output level. Replace cover. Job done.
In use, Maximum power is with the control fully anticlockwise.
With the squelch pot set anticlockwise and the set in CW mode, Transmit a carrier [ you will need to short the key jack] and set the carrier control for full power. You can then vary power on all modes using the squelch control.
Check the carrier control setting required for different bands, it will probably vary slightly between 160 and 10 metres. The protection circuits will still operate as before but if running low power the set will tolerate poor aerial matching without using the protection circuits.
Mod provided by G8BEQ
