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I reapet again : - Signal good on the scoop (dual tone sig) - Iddle current good - No IMD - 100 watts - Fine modulation by the OM reports - More than 4000 operating hours So ALC display is wrong...

Steve, Very useful data. Thank you for collecting it and putting it on the reflector. Nick N?LP

Hello, Has anyone tried to install the electret capsule Panasonic WM-61A or WM-61B on the HM-151 as described by PE1PWF on Mods.DK? Regards John

Yes, the ALC indicator does tend to go to full scale and into the red zone with compression on, but that doesn't mean it isn't creating splatter. Here is what I see on an Agilent 8924C analyzer hooked

Is it any wonder so many people blow up their radios and wonder why? But they will worry ad nauseam about how warm their radio is to touch. Mark

I had a 7K on the bench for a minor repair and measured the IC960-1 voltage with a 25 ohm load (two dummy loads in parallel) at 14.3MHz with 50 watts TX PO setting. It was 1.16 VDC and the SWR meter

Okay Captain, The ALC indicator is only meaningful when the speech processing (compression) is off, then ALC is adjusted with microphone gain. Power setting changes should have not affect. Follow the

No limit of the power... I read 100W. No SWR too... Alignment realize and same result... So 4000 operating hours, no problem and i suppose ALC info is wrong. I have not this "problem" with Yaesu

No, any splatter... Wrong ALC info sure... Best regards.

Excessively high ALC on SSB will produce IMD, which can't be seen in the envelope displayed on a scope. You need a good spectrum analyzer to see the distortion products. Or have a nearby ham with a

Hi Steve, Thanks to your instructions I tried to troubleshoot the swr problem. I monitored the IC960 and J2005-20 with some readings but nothing on the display. I also checked the ribbons with no

Hello everyone, 14 days ago i ran in the same problem. Took my radio to a A licensed friend of mine for doing some QSO in JT65 in 20m. RF power set at 30 watt, modulation level adjusted, swr was fine.

I'm ignoring the ALC... Mine go to high value but the The oscilloscope show fine sigs and no problem in transmission. 73

Generally speaking, mic gain controls ALC level on SSB, and carrier level controls it on carrier modes (cw/am/etc). If you lower power, ALC goes up on most rigs. Just reduce the drive, be it carrier

George - after reviewing your earlier post more carefully, your problem is not the same as the one I had. I did have lower power output on 80 and 160, but not as dramatic as you explained. But for

Thank you Steve for your "in depth" reply, I really appreciate!! Thankfully I have a sx-600 who monitors my tx. I also have the service manual so I'll have a look as per your instructions. Best

ok is the any way to adjust the ALC? and or how does it work? If I reduce the output power from 100W the ALC goes into the red?

You will need a Service Manual to do any troubleshooting. The SWR detector (D962) and bufffer amp (IC960) are easily accessed on the bottom of the PA board by just removing the bottom cover. They are

Hi, I resetted thi rig but nothing, no swr! All other meters are working fine. Who could tell me were to look on the board? Thank you for your time!!

If you have access to a signal generator, you can eliminate the driver and PA by testing RX sensitivity on each band, since the same filters and switching logic are used in RX as in TX mode. All of