[MRCA] UG-565 adapters and the RF-1110

[B. Smith]

Running high power with RG-58 is exciting. Especially the foam junk.
Z


On 7/19/2023 2:18 PM, Ray Fantini wrote:
>
> Ok, found enough connectors and adapter and will work on building up a 
> set of identical cables to go from the amplifiers to the combiner. 
> Looks like for now will be doing this with RG-58U but think I am under 
> the limit running 500 watts on each.
>
> Have all four Amplifier panels up and running now and discovered that 
> when running in idle the amplifier with full complement develops way 
> more heat then with just two amplifiers.  Harris wants the idle 
> current set to 3.0 amps on each device to push them well into there 
> linear range and that totals out to around 48 amps at 50 volts and the 
> full complement of devices chug along at about 2,400 watts dissipation 
> before you apply any drive!
>
> Each device has its own bias pot that will allow you to set bias 
> anywhere from just under three amps up to four but not any lower, 
> short of changing the design of the bias networks looks like that’s 
> what you get with the RF-1110B
>
> Don’t know if I will have everything up for full power ops by Saturday 
> for the RTTY net and may default to just running two panels like 
> before, still have to fabricate the cables, change the output 
> configuration to including the combiner and last but not least look at 
> spurious and intermod.
>
> Thanks to everyone who offered to help with adapters, cables and things.
>
> Ray F/KA3EKH
>
>
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