Re: FT101EE Mystery cut wire
Hi Mike,
The FT-101EE didn't come with a speech processor. Possibly the wire was left for adding the processor later on.
73 Roger VE7LB
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Inspecting my 101EE, I discovered a wire that apparently at some point got snipped. I cannot see anything that looks like where it was originally supposed to go. It's located under the PB-1092 "TRIMMER B BOARD", and the remnant wire is connected to ground.
On another note, while looking at PB-1092, I see that there is no associated C107 that the schematic shows parallel with TC9. All the other trimmers on PB1092 have their respective fixed value cap.? TC9 is associated with trimming the 15m band.
Any idea what may be going on here?
Thanks...!
Mike
KD7VRG
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Re: FT-101EE voltage measurements
Thanks to all who replied. I think I'll take the readings with both high & low impedance meters and see if there's any noticeable difference.
Again...thanks!
Mike KD7VRG Tucson, AZ
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-------- Original message -------- From: "Peter Fardell G0LQU via groups.io" <peter.j.fardell@...> Date: 12/15/22 5:49 PM (GMT-07:00) Subject: Re: [Yaesu-FT-101] FT-101EE voltage measurements
Those voltages are nominal. Plus or minus 5% is fine. Use any voltmeter. Peter G0LQU Roger VE7LB wrote: > For measuring your transformer voltages all of your meters (VTVMs, > modern DVMs, Simpson 260 etc.) will work fine. The accuracy will be > determined by the calibration accuracy of each meter. Circuit loading > will have no effect. > 73 Roger VE7LB >
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Re: FT-101EE voltage measurements
Those voltages are nominal. Plus or minus 5% is fine. Use any voltmeter.
Peter G0LQU
Roger VE7LB wrote:
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For measuring your transformer voltages all of your meters (VTVMs, modern DVMs, Simpson 260 etc.) will work fine. The accuracy will be determined by the calibration accuracy of each meter. Circuit loading will have no effect.
73 Roger VE7LB
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Re: FT-101EE voltage measurements
For measuring your transformer voltages all of your meters (VTVMs, modern DVMs, Simpson 260 etc.) will work fine. The accuracy will be determined by the calibration accuracy of each meter. Circuit loading will have no effect.
73 Roger VE7LB
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Re: FT-101EE voltage measurements
If you want to use a high impedence digital voltmeter, parrallel the VOM? input probes with a 10k ohm resistor for up to 10 v. 50k for +10 to 50v, 250k for higher voltages. This will? "load" the circuit very close if a 1000r/1 volt sensitivity meter is required.
Regards,
Tony
On Thu., Dec. 15, 2022, 10:08 Bruce Collins, < kb0tj1@...> wrote: Somewhere in the service manual I thought I saw a comment about using vintage impedance voltmeters for everything accept some lightly loaded RF stages, where a high Z vacuum tube volt meter is more appropriate.?
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Re: FT-101EE voltage measurements
To measure the output of a transformer a good dvm will do the job, just remember the off load voltages will be higher than when its connected and under load.
I've just replaced the transformer on an FT101ZD3 the 900v anode feed had bad HV capacitors which caused it to burn out, if you have power problems i would definitely replace all the psu capacitors and any diodes as well, i disconnected all the outputs from the psu boards and made sure all the output voltages were perfect first and then connected the outputs one at a time and checked them as i went, it took a while to find all the bad HV capacitors in the RF power stages before i connected the final 900v section.
i still have a bit of calibration to do but all the supplies are now good.
Theres a good site that gives a lot of info on the 101EE and other models ?
although the page is mostly about conversion to different valves theres lots of highlighted parts that take you to other pages where theres circuits and other information to be had.
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Re: FT-101EE voltage measurements
Somewhere in the service manual I thought I saw a comment about using vintage impedance voltmeters for everything accept some lightly loaded RF stages, where a high Z vacuum tube volt meter is more appropriate.?
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FT-101EE voltage measurements
Hello group,
I have an FT-101EE and am wanting to measure the various voltages off the main transformer.
What type of voltmeter is needed as far as ohms/volt is concerned? I own several. VTVMs, modern DVMs, Simpson 260 etc. Which is needed to get the most accurate reading?? I see no annotation on the schematic
Thanks
Mike
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Try exercising the switch, end to end, 20 times. If that helps give it 20 more. I find that any radio that has not been used regularly can benefit by exercising the switches. It wipes any oxide off the contacts.
73
Roger VE7LB
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 With the switch on “IC” rotating “Drive” increases the reading as expected, and rotating “preselect” moves the needle as expected. When I switch to “PO” the needle goes to 0 and stays there. I have tried to attach a video for illustration.
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I agree with the below Until you can solve the meter issue you could try: At plate dip, power out should be max – measured on external power/swr meter - provided the final tubes are aligned ok Then you can maximise PO with preselect and load on the same external meter ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Alistair GM4ENF via groups.io
Sent: Sunday, 4 December 2022 5:56 AM
To: [email protected]
Subject: Re: [Yaesu-FT-101] FT-101Z Tuning Issue ? Your description of the procedure you carried out is not too clear.? when you worked through the tuning/loading process did? the equipment respond as it should?? ie load giving an Increase in Ic followed by dip when adjusting tuning.? If so have you checked using another meter/device to see if there is any output irrespective of what the PO meter is showing???
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FT-101ZD changing the 2.3KHz SSB filter for a 2.7KHz filter?
Would changing the SSB filter to a 2.7KHz filter improve RX audio quality on SSB / AM?
Sadly the 101ZD has no switchable filter for AM / SSB and I've got a spare 2.7KHz Yaesu filter 'flying' around.
I heard that 2.3.KHz on TX SSB is preferable to 2.7KHz?
Thanks for the input
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Your description of the procedure you carried out is not too clear.? when you worked through the tuning/loading process did? the equipment respond as it should?? ie load giving an Increase in Ic followed by dip when adjusting tuning.? If so have you checked using another meter/device to see if there is any output irrespective of what the PO meter is showing???
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I had an FT-101B that had been in storage for over 20 years and fired it up. ?At first it worked and then didn’t. ?I found that there were two small diodes in the power supply that had died, actually physical broken. ?I replaced these and all was well. ?If I remember, I think they were in the enclosure that surrounds the output tubes.
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On Dec 3, 2022, at 7:21 AM, Jon.wellman via groups.io <Jon.wellman@...> wrote:
Hi All,
Having trouble with my FT-101Z. ?It has been on storage for about two years and was working before this. I have forgotten a lot about using it. ?During the Final Tuning procedure, the PO meter stays at 0 and does not move. The earlier tuning step, the IC meter behaves as expected. Any ideas? Thanks!<2C83B1C3-C7AA-41F8-B438-521AF831504A.jpeg>
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Hi All, Having trouble with my FT-101Z. ?It has been on storage for about two years and was working before this. I have forgotten a lot about using it. ?During the Final Tuning procedure, the PO meter stays at 0 and does not move. The earlier tuning step, the IC meter behaves as expected. Any ideas? Thanks! 
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THIS IS STILL AVAILABLE AND STILL A GOOD DEAL! ?I have an FT-101ZD for sale. ?It's in excellent working condition and about 8/10 cosmetically. ?It will also come with an outboard second VFO. Photos available upon request. ?I bought this from a friend who did extensive renovation. ?He's an expert in the repair of these old rigs. ?I had thought that I'd use it more than I have, and it's become excess to my needs. ?I will sell the rig and external VFO for $550, plus actual professional packing and shipping charges. ?The rig also comes with a manual and a Yaesu hand mic. ??If you've been looking for one of these old classics, you probably can't find a better one. ?I greatly prefer PayPal for payment. Interested buyers please email me off list at carl --at-- mycallsign --dot-- com. ?-- 73 de Carl N8VZ
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Undoing AM modification to restore CW operation
I am trying to un-modify an FT-101 EE to restore CW operation in a radio that has an AM filter and the mode switch modification installed. Everything seems to be OK from the pictures and directions in the service manual as far as restoring CW operation. I can do everything as far as reconnecting wires and diode except the yellow wire that goes to the heater switch from pin 4 in the AM modification. Does any one have a clue where that wire came from originally and what I should do with it? Does it just hang in the air or did it actually have a connection on the other end from the heater switch?
Don, AK2S
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I HAVE THE FL101/FL101 PAIR BUT WHATS MISSING IS THE UMBELICAL CORD LINK THE PAIR , THE FL101 HAS BEEN REPAIRED AFTER A LIGHTNING STRIKE AND NEW VALVES , AND SOME WIRING REPLACEMENT , WOULD BE GREAT IF I COULD THE PAIR BACK ON THE AIR , ANY SUGGESTIONS OR ANYTHING THAT MIGHT HELP ME TO GET THESE BACK ON AIR WOULD BE MRE THAN HELPFUL , THANKS , STEVE 2E0MDM?
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Re: Location of FH2 Ft101ZD MK3
As and when someone fixes this radio I would be interested to know what the fix was.??
Al GM4ENF
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Tony VA7TF, VE7ACF
Bruce Collins
Alistair GM4ENF
Carl Jón Denbow N8VZ