[MRCA] Sunair RT-9000B/9500/9310 power setting issue

[Ray Fantini]

On the 1A2A1 control card you may want to look at U13 and 14 being they are the operating system ROM for the radio. U2, the 80C85 CPU reads them first and runs there program. U8 is a EPROM and used for storing things like the memories, presets for AGC and modes and would speculate when using the amplifier that's where the information is stored. But be warned i have never seen one of the amplifiers up close before so i may be wrong.
Just for fun look at S1 on the CPU card, my 9000B manual only refers to things like the TXCO and pre selector options on that switch with a lot of stuff being undefined, perhaps that's where they place a setup note for the difference of what external amplifier is applied on other versions of the software?

Ray F/KA3EKH

________________________________________
From: mrca-bounces at mailman.qth.net <mrca-bounces at mailman.qth.net> on behalf of W2HX <w2hx at w2hx.com>
Sent: Saturday, April 14, 2018 11:39 AM
To: mrca at mailman.qth.net
Subject: [MRCA] Sunair RT-9000B/9500/9310 power setting issue

Hello again, friends.

The issue I had before seems to have corrected itself after powering down everything and disconnecting the power for a few hours. I suspect there might be some config that is held up while the AC power is applied even if the power is off. Not sure. Either way that seems to have been resolved. HOWEVER!

I would like to resolve one issue while using the RCU remote unit.  When the RT alone is operating with the LPA, the RT correctly knows that the only power levels available are 125W and 500W. When toggling through the PWR/LVL correctly the amp alternates between Bypass and 500W.

However, when using the RCU it thinks the amp is a 9600 not 9500. And therefore thinks there is a 1KW option as well. So it will rotate between 125W, 500W and then 1KW which of course the amp does not have. The amp gets confused and the RT also gets confused. The video below shows the exact behavior.

https://youtu.be/zJNTSs-cSFU

Apparently the RCU does not learn what power levels are available from the RT when communicating with it, which would seems to be a sensible thing for it to do.  I have looked through the manual for the RCU and I do not see any option to tell the RCU that 1KW is not available.  Does anyone know how to prevent the RCU from cycling through a 1KW option when it isn't available?

Thanks all!
Eugene W2HX


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