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Re: TX / RX Frequency Alignment
Thank you for this information, Mat. I dont know that until yet. Very good to know !! vy73 de DL23EBZ, Bodo
By airborn2000@... · #510 ·
Re: TX / RX Frequency Alignment
Hi DL2EBZ, There is certainly a very limited range on the "stock" variable pulling capacitor in the oscillator circuit. If you run out of range, you can add or remove capacitance by changing values
By Mat Breton N8TW · #509 ·
Re: TX / RX Frequency Alignment
Hi Brian, There is nice article on the thermally-stabilized crystal in the Files section (how it works, how to adjust): See
By Mat Breton N8TW · #508 ·
Re: TX / RX Frequency Alignment
Hey Brian. Last year I gave my '980' to a complete service - a complte check-up. It needed about 6 month and costs about 850,- €. One of the points to make better, was the bit of
By airborn2000@... · #507 ·
Re: TX / RX Frequency Alignment
Thank you kind sir.
By Brian Harris · #506 ·
Re: TX / RX Frequency Alignment
Hi, ?? on the right side of the cabinet (facing at the front panel) there is an access hole to TC7001, located in the VFO unit. With a plastic screwdriver you can adjust this trimmer capacitor
By IN3FTD · #505 ·
TX / RX Frequency Alignment
I am fairly sure my actual receive and transmit frequencies are off a bit. Are there simple adjustments to correct? My transceiver is untouched from new except for a batter replacement. Brian
By Brian Harris · #504 ·
Re: kp keypad tone non functioning
Thinking further: was there any chance that the keypads were swapped? I am wondering if one of the piezos could have shorted to ground and taken out Q6015 (the driver transistor). If swapped, it
By Mat Breton N8TW · #503 ·
Re: kp keypad tone non functioning
Hi Robert! I've never liked the keypad beeper on the FT-980. Mine is VERY quiet and quite high-pitched. During normal operation I can't really hear it over the normal HF hiss. Since there is no
kp keypad tone non functioning
both my 980s been sitting around unused for many years. now neither of rigs, the kb buzzer non functional. worked the rear kb switch many times- no change. need to get to the keyboard where buzzer
By ROBERT Donchez · #501 ·
Re: need a power on off switch
The listed shipping on that item is over $100 USD. From Oklahoma? I think there is a typo in his shipping details. Looks like he parted out an FT-980: lots of parts listed in his ebay "store". The
By Mat Breton N8TW · #500 ·
Re: need a power on off switch
Hi Bob, if worse comes to worse, looks like there is one available for sale on Ebay right now: https://www.ebay.com/itm/305982582626 Mike - KQ4VKJ
By thenetworkisdown@... · #499 ·
need a power on off switch
a friend has just brought back my 2 - 980s- bought one year after another in 82/83- even cleaned all switches, connectors, bench tested all at length- the power switch arced bad and pops loudly when
By ROBERT Donchez · #498 ·
Re: FT-980 tuning issues
By on4dto@... · #497 ·
Re: FT-980 tuning issues
Hello everyone? ?
By on4dto@... · #496 ·
Re: Garbled Voice USB and LSB - troubleshooting and repair advice
There is nothing complicated, we throw away the generator on the quartz, and instead we put TCXO 30,000,000
By Ur9ip · #495 ·
Re: Garbled Voice USB and LSB - troubleshooting and repair advice
Ur9ip, Sounds very stable / accurate and a nice upgrade. Was it very expensive?? I wasn't finding anything with that spec PPM out on digikey.? Do you have a link to where you were able to buy
By thenetworkisdown@... · #494 ·
Re: Garbled Voice USB and LSB - troubleshooting and repair advice
Hi, I struggled with the 30 MHz generator for a long time, then I installed TCXO 30,000 MHz 0.01 PPM, and forgot about the problem
By Ur9ip · #493 ·
Re: Garbled Voice USB and LSB - troubleshooting and repair advice
You are very welcome, Mike. Glad we were able to help! Just a note: it is possible, even likely, that the trim capacitor will continue to drift. You might need to repeat this someday ... or possibly
By Mat Breton N8TW · #492 ·
Re: Garbled Voice USB and LSB - troubleshooting and repair advice
Wow!? I went through checking the BFO value SHIFT setting voltages as you suggested and they were indeed *way off*. Once I was able to get them back adjusted to the proper voltages, all seemed to
By thenetworkisdown@... · #491 ·