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Great update Fred!? Thx. On my end, I wanted to comment about my CW-N filter mod that I posted earlier. I cascaded two CW filters (455 kHz and 8.9 MHz) to get a better selectivity.? That objective

Figured I'd tickle the list a bit to keep it active. Pulled one of two FT-980s currently inline out of line in preparation for replacement of TC4001 and all the electrolytics on that particular

Hi Rocco, indeed the same behaviour applies to my rig: about 90% of mic gain is needed in order to achieve Alc compression. In my case the simple hand microphone is used. Did you discover any news on

Hi Enrico. In fact, the calibration procedure of the AMGC is not at all mentioned. I thought it might serve the gain of the TX-IF chain. This is because I tried to use an MD-100 in THRU mode and

Hi Jose, When properly set, the IF Shift "function" should not be affected by switching from USB to LSB and back. The audio passband should not "change" by shifting the SSB mode. Note: you can

Hi Rocco, you are right: no explanation in Tech Supplement about VR09 in IF Unit. I think it is used to set the polarization of Q36/JFET working as AMGC Gate. Indeed I didn't care of it when I retuned

Wich is the function of VR09 on the IF UNIT near Q34-35-36 ? On which page of Technical Supplement can you find the adjustment procedure? Thank's to all 73 IK6GQC? Rocco

I replaced the trimmer in two FT-980s.?? It can be done especially if it may be broken.? The original trimmer was of poor quality. Dave K4JRB

Mat, should you return the IF SHIFT control when go from USB to LSB and viceversa? Dr. José Carlos León Ortega UDI- Universidad para el Desarrollo y la Innovación Tel. (591 3) 3422525 Santa

Heads up: here is a description for replacing the original trimmer capacitor. See the file " Wireless Article - FT-980 BFO-Shift Oscillator Fix - Part 2.docx (

Very thanks Enrico for your reply. Really radio works on USB and LSB, but I always should to move the IF SHIFT control for best tuning. It is a testimony that something is not ok on CVC circuit. If I

My BFO likewise tunes similarly: max to 6V, but min is only 5.something (I forget) volts. Works fine. This is even after replacing the original trim-capacitor with a much better one. -- -Mat Breton,

Hi Jose, I made the same experience some months ago, when I retuned the whole rig. I don't remember the precise values but I remember a similar behaviour. Nevertheless no problem at all arose from CVC

Hi, friends, I tried to do the aligment described on pag 23 of Tec Supplement. BUT, I have not succefull on it. I turned the TC01 to obtain the voltage on TO04 6 V, with USB mode and IF SHIFT

Ohhhh, I found them. I have never seen them before. Very thanks, Mat. Dr. José Carlos León Ortega UDI- Universidad para el Desarrollo y la Innovación Tel. (591 3) 3422525 Santa Cruz - Bolivia

Hi Jose, Use the SECOND set of schematics in the FT-980 Technical Supplement, which can be found in the "Files" section, not the debugging/alignment schematics which are earlier in the

Hi, guys, I need an IF Unit circuit without black labels indicating voltages and signals. These labels are over the lines of circuit and I cant to follow the lines of this Unit. Thanks.? Dr. José

Hi, Mat and everybody, I have measured something on radio. Here what I found: In IF UNIT: In J01 connector--? There are the following signals:? AMW, AMN, CWW, CWN and SSB. Anyone should be on 13,5 V

Mat, I removed? the batteries from packed and waited 5 minuts. Then replaced them on pakect and radio did not change. Even check all signal from input and output in pll and vco on PLL board. All are

If you can't hear anything on any mode, it is probably not the BFO VCV. When mine was bad I was still able to do AM, FM, & RTTY. We'll wait back to hear about the RAM reset ... -- -Mat Breton,