One. If you have made the diode modification that I recommended so many years ago to protect Q 90, in early versions this isn¡¯t much of an issue. ?Otherwise yes, you might will blow something. Because you will eventually blow that transistor if it remains unprotected I haven¡¯t looked at the schematics of the later versions so I don¡¯t know what¡¯s going on there. ?The original design acted like a RF power supply to reverse bias the base emitter junction and eventually blow it. ? Anytime you have a diode and what turns out to be a ¡°power supply ¡°there is a requirement for a certain reverse voltage capability. ?If there¡¯s a capacitor in series with a diode you have built a power supply! Think about it
Two. ?At our emergency operation center we have three HF transceivers connected with a single coax switch to our output system. ? There are different varieties of coax which is, some with better isolation than others, we have done fine but you might wish to get one that grounds the unused ports.?
Gordon Kx4z?
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On Mar 28, 2023, at 22:27, Richard Spohn <wb2gxm@...> wrote:
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I avoid possible radio damage by using a bnc patchbay instead of switches. Bnc connectors are much quicker and more convenient to use than most other types of rf connectors such as pl259s-so239s. -- Rich WB2GXM
Hi
Now that I have the ubitx 6 working great I would like to connect it to my antenna tuner and then to the antenna as a second radio. I want to be able to use the Icom or ubitx (but only one at a time)? without having to plug and unplug cables all the time.
I have seen several youtube videos saying that you can usually hook two radios to a coax switch with one outgoing cable to the antenna tuner and then antenna.
The videos talk about isolation between the ports and suggest that there is enough isolation to avoid radio damage. I dont see anyone reporting radio damage.
Has anyone hooked a ubitx v6 to a coax switch and run a 100 watt radio thru the other port without damaging the ubitx v6 ?
Would hate to brick the ubitx just for convenient hookup !
thanks
David W9PH
