Hi everyone,

i apologize if my first post can be off topic, but hope someone can give me an advice.

I have a working 7K's PA board , 2 rd100hhf1 and a driver board. I found also a empty 7000 body with fan (without front unit).

I would like to use this material for building a 1,8-50-mhz 100w linear for my Hermes Lite (5W out). What is missing is a control? interface for switching the different pass band filters and check the swr or power. I'll try to find a way to build something with a arduino or a Pi Pico but before starting i was thinking what must do this board. So i'm asking some guru in this forum if they can explain me , in detail, how the 7000 change the band and measure ros/pwr...

If the argumented answer point to a excessive complexity of the project i can think to swap those parts with some colleague.

Thanks in advance.

73

--

EA8DJR LUCA

Tage

73

Neil ZL3ADC

Sorry, here's that photo. Note the red insulation worn away at the fuse connection.

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Thank you all, vy much, for your responses. The first thing I did was examine the fuse cases. I received this radio from a friend and the power cables included seem to be OPC-025D, with a 6-pin connector on one end, used with a 6-pin to 4-pin adaptor into the radio. I saw that at one of the fuse case ends, the rubber insulation was gone from the wire, and the wire was exposed. Photo attached. Suspect, no? I'll replace this cable and see if that improves things.?

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I'll report back.?

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Thanks again!

73, Colin N2TQT

I had that problem some years ago. I was using a Samlex PS with fused wires and molex connectors. Very frustrating. I shotgunned it this way: use Anderson connectors, no inline fuses and sold the Samlex and use the little West Mountain Radio PS. I did not change the factory molex on the back of the radio. I just bought some connectors and made a little pigtail with the factory molex-type at one end and an Anderson connector on the other.?

Also, I want to add this was quite a few years ago and I got help on this group to solve the problem.?

73, Larry W7DGP

Enjoying my IC-7000 since 2007

I have been trying to install version 2.6.1 and I get ?a failure message - can't find ".hamlib_settings". ?Should come with the WSJT program or do I need to find it somewhere? ?I'm using a Linovo Yoga cpu and a IC7000 with a Signalink.

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Thanks,

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Ed KE6SU

I've had this happen to me in the past. Fuse holder connections, power connections, even one time a defective fuse. The fuse read continuity with a meter on ohms

Signal level tracing with a 'scope is the way to go, looking at the levels in and out of the driver and to the finals.?

It is always possible that there is a problem past the finals as well.?

Sometimes you just have to drag out the test gear and take a look.

I'm bringing this thread back to life because I'm having a similar problem with my IC-7000 using the 9600 baud rate. I have a DigiRig Mobile and the idgiRig 6 pin DIN cable, fo rCAT control I am using a USB cable separate from the Digi. The software is VARA FM. The radio is set for 9600 baud per the manual on page 116. I do have audio at the digirig but at the radio when it is in xmit mode the audio input is very low. I have all levels on my laptop at 100% and I have tried different levels thinking I might be overdriving the radio. Just for grins I thought I would also try it on my Yaesu FT-7900R since it has the same 6 pin connection and I still have low output. I don't own a scope so I can't measure the output, the Icom likes to see about 0.4 Vp-p or 0.2 Vrms. Of course, the radio works fine on the SignaLink using the 13 pin cable on HF, but FM comms at 9600 baud is my main goal here. I hope somebody has this figured out. Laptop is running Win11.

73

Rory-N6OIL

Hi Tommy

not easy to find these type of issues, check dc voltages around the final circuit, coupling capacitors and switching devices.

Good luck

james

Make sure that all of the power connections are clean and tight. If the fuse holders are still in your power cable especially make sure that they are clean, bright and tight.

Also if you have a dummy load see if with a short cable to it the radio still cuts out. (after cleaning the connections.)

James,

All functions work on all bands for receive.? Because of that I believe the filters and switches are functioning properly.

There is no SWR, power meter or ALC meter for HF transmit at any power setting.? Only a very slight deflection at the external power meter (less than 0.25W).? The deflection increases slightly for 10 meters and 6 meters but all well below 1W.

It is just not amplifying significantly beyond the driver.

I am puzzled

Thanks

Tommy KF4RWG

are there any indicators like tx power level and check current draw.

is the power being throttled ? Any heat being dissipated due to current draw? look for hot spots

Hi Tommy

check the components within the boxed lines in the below picture .

make sure the correct LPF is active for the selected band in use.

James

I purchased the radio with this symptom. ?Everything seems to work for VHF/UHF. ?This means the driver is functioning. ?When I trace the HF signal with a scope past the driver I do see a signal that varies with the power adjustment. ?This indicates to me that the ALC is functioning. ?The finals were removed and checked good with a transistor checker. ?The HF signal through the driver output seems to lose amplitude down the path through the finals and is negligable at the antenna connector. ?All this through a power meter and a dummy load. I would appreciate any suggestions or help to diagnose the problem.

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Tommy KF4RWGL

Hi Geoff

nothing on the S-meter, but occasionally the unit starts to splatter high levels of audio when warmed up - nothing recognizable just splatter.

The 8v regulator underneath the main board gets pretty hot - from what i have read this may be normal.

Just waiting for the replacement Ic551 now

James