Dave — I’m also refurbishing an old FT-101B which I actually bought back in the 70s and used then. ?One thing I need to know is regarding the BM adjustment pot (next to the ALC). ?I think it may have been changed inadvertently and I can’t find anything in the user or service manuals that says anything about this adjustment. ?Do you have any information about this?
I have checked the rig out and it does receive and transmit and the pots and switches are noisy. ?I haven’t replaced any capacitors. ?Others have said replace all the electrolytics. ?I appreciate your providing advice for specific capacitors and sources.
I had an old tube bass amplifier and had the?worst time getting capacitors with high enough voltage ratings. ?I actually blew some up with lower voltage ratings. ?Fortunately Fender had placed them in a metal box so they didn’t blow up all over the rig. ?It did make for a novel performance experience.
Thanks,
—碍别苍辞濒颈 KB6EMG
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Hi Dave,
Do you also have the 120 volt power cord?
About your 40+ year old FT-101 high voltage capacitors. You should replace the two main high voltage capacitors on a 40+ year old FT-101. See eBay item https://www.ebay.com/itm/254527364032?hash=item3b43035bc0:g:CDoAAOSwyWheWysT (I have nothing to do with the seller). If they fail they can take out the power transformer.
It's also a good idea to change out C13, the 80pf@ 1kv driver to final coupling capacitor.? Also C11 a 200pf @ 1kv in the driver plate circuit? Bad things can happen if C13 shorts.
If you have scratchy controls and switches. The first thing I do with a radio that has been stored for a long time is exercise all of the front switches (especially the band switch) and pots end to end. Sometimes as high as 40 times each with the power off. Then I check to see what is still noisy and go from there. Most people like the Deoxit brand for cleaning switches and pots. Use care on the band switch - I use a toothpick and apply only to the contacts.
73
Roger VE7LB Group Owner
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Hi I’m newbie to this group and this radio my serial number is 2F 123167 the unit looks in great condition? but still need information? here is a picture? I have a yaesu handheld microphone 500 ohm and the dc power supply cable wired connector? where do I start? any help would be appreciated? 73   David VE3DPC
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FT-101E vs. FT-101ZD Receive Performance and Operation — Which One is Better?
Considering the receive performances and operation of the FT-101E and the FT-101ZD, which one is better and why?
Thank you.
73, Michael Smith, N4KZO
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Gray Paint for FT-101ZD Cabinet Screws
I bought some 316 stainless steel screws for the FT-101ZD cabinet covers from McMaster-Carr. ?Can anyone recommend a spray-paint that is the cabinet’s shade of gray?
Thank you.
73, Michael Smith, N4KZO
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Hi Kenoli,
Sorry no one has got back to you until now.
RE your BM adjustment: If you have another radio with a receiver use this procedure. Tune up the radio you want to adjust on one of the lower bands (80, 40 or 20) into a dummy load. Switch it to USB or LSB and listen to it with the second receiver. Then turn the mike gain all the way down and adjust the control right next to the ALC pot a bit off center until you can hear the carrier clearly on the second receiver. You may have to tune the second receiver off frequency a bit to hear the carrier as a tone. Then adjust the POT for the lowest carrier signal. You may also see the IC meter go up and down a bit.
RE your 40 year old FT-101B high voltage capacitors. You should replace the two main high voltage capacitors on a 40+ year old FT-101. See eBay item https://www.ebay.com/itm/254527364032?hash=item3b43035bc0:g:CDoAAOSwyWheWysT (I have nothing to do with the seller). If they fail they can take out the power transformer.
It's also a good idea to change out C13, the 80pf@ 1kv driver to final coupling capacitor.? Also C11 a 200pf @ 1kv in the driver plate circuit? Bad things can happen if C13 shorts.
RE scratchy controls and switches. The first thing I do with a radio that has been stored for a long time is exercise all of the front switches (especially the band switch) and pots end to end. Sometimes as high as 40 times each with the power off. Then I check to see what is still noisy and go from there. Most people like the Deoxit brand for cleaning switches and pots. Use care on the band switch - I use a toothpick and apply only to the contacts.
73
Roger VE7LB Group Owner
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Thanks.? I have that manual however and it says nothing about a bm adjustment.
--Kenoli
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Em sábado, 25 de setembro de 2021 22:40:00 BRT, Kenoli Oleari <kenoli@...> escreveu:
I think my BM adjustment was inadvertently changed when adjusting the ALC.? They are next to each other.? I couldn't find anything about this adjustment in the user or repair manuals.? Can any help me make sure the BM adjustment is set correctly?
On a different topic.? I have an FT-101B that I used back in the 70s.? It has been sitting in a box for maybe 40 years.? I started it up using a variac and bringing the voltage up slowly.? It is clear from noise in various controls and switches that there are dirty of corroded contacts.? Is it advisable to spray contact cleaner on noise controls and, if so, what is the correct way to do this?
It does send and receive.
I look forward to and appreciate any assistance on these two matters.
Thanks,
--Kenoli
KB6EMG
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I think my BM adjustment was inadvertently changed when adjusting the ALC.? They are next to each other.? I couldn't find anything about this adjustment in the user or repair manuals.? Can any help me make sure the BM adjustment is set correctly?
On a different topic.? I have an FT-101B that I used back in the 70s.? It has been sitting in a box for maybe 40 years.? I started it up using a variac and bringing the voltage up slowly.? It is clear from noise in various controls and switches that there are dirty of corroded contacts.? Is it advisable to spray contact cleaner on noise controls and, if so, what is the correct way to do this?
It does send and receive.
I look forward to and appreciate any assistance on these two matters.
Thanks,
--Kenoli
KB6EMG
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FT-101ZD MK0, Series 05: 12 Volt D.C. Power Supply Tolerance
Does any one know the tolerance for the 12 VDC power supply? ?With the transformer set to 117 VAC (noted on the rear panel), the 12 VDC buss measures 11.77 VDC at the Lever Switch Unit PB-1975 (NO. 20) S01 (input, brown wire), D.C. supply to the noise blanker.
Thank you.
73,
Michael Smith
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Re: Fox Tango Corp. 89H2.1 IF Filter Specification and Installation Information and Schematic Needed: filter installed in an FT-101ZD Mk 0
Assuming you are using a PC log into the web page /g/Yaesu-FT-101.
You will find the Files section near the bottom of the left pane.
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Re: Fox Tango Corp. 89H2.1 IF Filter Specification and Installation Information and Schematic Needed: filter installed in an FT-101ZD Mk 0
Thanks Roger. ?How do I get to the Files section?
73,
Michael
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Re: Cabinet Cover Screws for an FT-101ZD
I see them on eBay frequently.?
On Wed, Sep 15, 2021 at 12:25 PM Michael Smith via <tw8kcabpilot= [email protected]> wrote: Having misplaced the eight top cover screws, I am looking for a set of cabinet cover screws for a Yaesu FT-101ZD transceiver.? The screws are cadmium plated steel metric, 3 mm diameter, 0.5 thread pitch, Phillips pan head painted a dark gray, of length 5 mm fully threaded.? I would like the gray painted screw heads to match the original cabinet paint.
Thank you.
73, Michael Smith N4KZO
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Re: Fox Tango Corp. 89H2.1 IF Filter Specification and Installation Information and Schematic Needed: filter installed in an FT-101ZD Mk 0
Hi Michael,
Take a look in the Files section and open the old Fox Tango Newsletters pdf. Do a search for "Filter". These page number entries came up under FT-101ZD: 7942, 8233 & 8213. There are others as well but these are the first three.?
You will find 7942 (Year 1979 page 42) in the pdf at page 477 (of 1292 pages). This looks like what you are looking for. If not just keep searching.
73
Roger VE7LB
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The best test will be replace the high frequency module PB1181. Year ago I saw an exotic problem, the R13 off 1k was damaged or with wrong resistance. A good idea is measure voltage over transistors leads. pg 5-12 good luck
Emerson PP6EW
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Cabinet Cover Screws for an FT-101ZD
Having misplaced the eight top cover screws, I am looking for a set of cabinet cover screws for a Yaesu FT-101ZD transceiver. The screws are cadmium plated steel metric, 3 mm diameter, 0.5 thread pitch, Phillips pan head painted a dark gray, of length 5 mm fully threaded. I would like the gray painted screw heads to match the original cabinet paint.
Thank you.
73, Michael Smith N4KZO
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Yaesu XF8.9HC 600 Hz IF Filter for CW Mode in an FT-101ZD
I’m looking for a Yaesu XF8.9 HC IF filter for the FT-101ZD in excellent, like new, or new condition.
Thank you.
73, Michael Smith N4KZO
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Fox Tango Corp. 89H2.1 IF Filter Specification and Installation Information and Schematic Needed: filter installed in an FT-101ZD Mk 0
I have found that a Fox Tango Corp. 89H2.1 IF filter has previously been installed in a used FT-101ZD Mk 0 that I purchased. ?I have no documentation for this installation, and cannot find any?on the internet.? The original Yaesu SSB filter was left mounted on the PB-1963B UNIT (IF board) and the Fox Tango filter mechanically attached to the Yaesu filter case with copper foil tape.? A small PCB; with what looks like a transistor, a resistor, fixed capacitors, a variable capacitor, and inductor; is mounted with double sided tape atop the Fox Tango filter; I assume this is for impedance matching and possibly an amplifier. ?A small gauge red/white wire has been run from underneath the PCB through a mounting hole for the presently empty CW filter space, to the small PCB. ?(I expect that?this wire will need to be rerouted to properly install a CW filter.) ?Coaxial “jumpers” were connected from the Fox Tango filter I/O to test pins atop the IF board. ?
Do you have any information concerning this Fox Tango filter installation-modification, so I can clarify the functionality (either impedance matching or amplifier, or both) of the small circuit atop the filter, and for reference when needed, to understand exactly what has been done? ?In general, I understand an SSB 2.1 KHz wide (@ -6 dB?) IF bandpass (crystal ?) filter has been installed, while I would like to understand why the original filter was left in the radio. ?Is the original SSB filter still functioning in the radio? ?Also, I would like to know insertion loss and all specifications of this 2.1 KHz IF filter. ?A filter response curve plot would be great, expecting that to accompany the written specifications.??The schematic, installation instructions, and filter specifications documentation would clarify, and answer my questions.
Does the variable bandwidth control still function as described in the Yaesu instruction manual, with exception to the maximum bandwidth? ?It is a mystery to me why the original filter was left in the radio, unless it is cascaded with the Fox Tango Corp. filter. ?Is the original SSB IF filter functional in the radio, or has it been electrically isolated and left mounted on the IF board? ?Does anyone have actual experience with using the Fox Tango 2.1 KHz IF filter in operation with the FT-101ZD
who could qualitatively comment on its effectiveness and performance?
Thank you.
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Since it is a fast acting event... the?first thing I would do is replace the receive first RF amp.?
Q1 dual gate mosfet.?
3N211 transistors are still easy to find.?
But any decent, four leg dual gate mosfet
of that ilk.. will tell you if it’s bad.?
I doubt the receive line fuse is blown, as others might suggest.?
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Noticed recently my receive was dying? My 101 s meter doesnt move unless its a real strong? signal? I notice a signal from someone giving me maybe 2 s units and my other rig shows 10 S units? What should I be looking into . Any help is appreciated
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Bruce Collins