"Another way is to add series diodes between the driver and the amplifier. You will want to have pullups on the amplifier side.... Jack Brindle, W6FB"
This is a good solution. The HL2.5 has internal pull-up resistors so you would just need the series diodes in the interface cable (anode towards the HL2.5 amp). The HL2.5 uses a DB15 connector, so it would be easy to add the diodes inside the mating connector. The HL1.5 does NOT have internal pull-up resistors. So if this idea is used with the HL1.5, pull-up resistors must be added inside the amp or in the interface cable with a means of connecting to a pull-up voltage source. The HL1.5 uses a 240-degree 5-pin DIN, so there is not much room inside that connector. Phil - AD5X ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
