Going off some Inrad, Fox Tango and Yaesu data here:
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I've found filters in 20KHz, 12KHz, 6KHz, 2.4KHz (of various shape factors and pole counts), 1.8KHz, 600Hz, 500Hz and 250Hz bandwidths.
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Were there any more bandwidths offered? 4KHz, 350Hz, etc.?
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The 12KHz ones (Tayima P/N TF30H12) also cross to a YF30H12. I cannot find any of these stateside. Perhaps someone has a couple in their junk box? There's an eBay seller in UK who offers them but doesn't ship to the US - and won't return a message about them. Perhaps someone across the pond can help me snag a few?
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Thanks - 73
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Fred, N8YX
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Re: FR-101D with LED display?
Resurrecting an older thread, but with pertinent info for FR-101 owners:
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I recently bought an FR-101D (S/N 8H210225) from the auction site as a restoration project. The receiver has red LEDs in the display. Some years ago I'd gotten a late model display unit and bezel from a parts seller with the aim to convert my FR-101S to a D but this one just happened along.
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After cleaning and inspection I powered it up to check out the display. Bear in mind that a number of standard range crystals had been swapped for others of various coverage segments so I had no idea what to expect from the display. On most ranges it's reading 500KHz low. I'm assuming this has to do with a range selection line (0/+500) so that's to be investigated. I wanted to make sure someone hadn't fooled with the VFO so I swapped my other red display unit in.
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With that one...15 and 20M track correctly. The others...either show "96.000.0", "4.000.0", "1.000.0" or are 500KHz low. Next step was to physically examine the counter boards and check for evidence of funny business. What I found are two distinctly different PCBs. I'm not sure how either compare to the schematic posted earlier in thread but comparison and analysis is the next step. Then diagnosis and repair.
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The original counter has S/N 210142 affixed and the spare, 200350. I took pics of both sides of the boards as well as a rear shot with the S/N tags. Will upload them if anyone's interested, and update this thread with comparisons from the schematics.
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73 - Fred, N8YX
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The Actual Update Version of the FT-101ZD Survival Guide Wanted
I completed a web search for the subject document. ?I found version 3 at the foxtango website. ?I found one response at a person’s personal website with version 4, dated Spring 2016; all others found were prior to version 3. ?Perhaps I overlooked it at the foxtango website where I would expect it to be, but can anyone tell me what the real latest version of PA0PGA’s FT-101ZD Survival Guide actually is at present, and where it can be viewed and downloaded? ?Perhaps this group.io has it stored someplace. ?Version 4 has an apparent critical new message about the “Killer Condenser” in the final cage which short circuits and causes a calamity of damage, apparently having happened many times to others.
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Thank you.
73,
Michael Smith, N4KZO
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National WD9223 DPST 250VAC, 10A Power Switch
I’m looking for an original switch made in Japan, in new or like new condition.
Thank you.
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73,
Michael Smith, N4KZO
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Re: FT-101ZD Rectifier B Board Orange Material Around Base of Radial-Lead Capacitors
It is adhesive used to keep the caps in place, usually during machine soldering. It starts out yellow but as it ages it becomes brown. It also can become conductive and corrosive. Best to remove it before it creates problems. On Thu, 3 Oct 2024 13:06:26 -0700 "Fernando Quinones N2FQ via groups.io" <n2fq@...> wrote: I recapped that board and is dry adhesive. I just scraped it off and installed new capacitors.
I’m not worried about any vibration that might fatigue the leads of the caps.
Fernando N2FQ/6
On Oct 3, 2024, at 12:53?PM, Michael Smith via groups.io <tw8kcabpilot@...> wrote:
There is an orange material filling the edge-space between the Rectifier B Board and the end of some cylindrical electrolytic capacitors. This occurs only on capacitors along the outside of the mounted-capacitor array, upward and sideward (front-back), of several electrolytic capacitors on the vertically mounted board. -- 73 -Jim NU0C
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Re: FT-101ZD Rectifier B Board Orange Material Around Base of Radial-Lead Capacitors
I recapped that board and is dry adhesive. I just scraped it off and installed new capacitors.
I’m not worried about any vibration that might fatigue the leads of the caps.
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Show quoted text
On Oct 3, 2024, at 12:53?PM, Michael Smith via groups.io <tw8kcabpilot@...> wrote:
There is an orange material filling the edge-space between the Rectifier B Board and the end of some cylindrical electrolytic capacitors. This occurs only on capacitors along the outside of the mounted-capacitor array, upward and sideward (front-back), of several electrolytic capacitors on the vertically mounted board. ?It looks to me like this orange material is meant to be there, as if it is perhaps a dielectric to prevent breakdown to anything grounded that gets close enough and to keep dust out of these crevices, as these capacitors are used in circuits that produce bias voltages. ?I’ve seen this material on more than one FT-101Z.
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Looking in the Survival Guide and Yaesu - Musen Maintenance Manual, I see no mention of what this material is. ?Does anyone know with certainty what this material is doing there, or how it got there?
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Thank you.
73,
Michael Smith, N4KZO
<IMG_0164.jpeg>
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FT-101ZD Rectifier B Board Orange Material Around Base of Radial-Lead Capacitors
There is an orange material filling the edge-space between the Rectifier B Board and the end of some cylindrical electrolytic capacitors. This occurs only on capacitors along the outside of the mounted-capacitor array, upward and sideward (front-back), of several electrolytic capacitors on the vertically mounted board. ?It looks to me like this orange material is meant to be there, as if it is perhaps a dielectric to prevent breakdown to anything grounded that gets close enough and to keep dust out of these crevices, as these capacitors are used in circuits that produce bias voltages. ?I’ve seen this material on more than one FT-101Z.
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Looking in the Survival Guide and Yaesu - Musen Maintenance Manual, I see no mention of what this material is. ?Does anyone know with certainty what this material is doing there, or how it got there?
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Thank you.
73,
Michael Smith, N4KZO
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I am looking for an analog display for the FT-101Z in excellent or better condition. ?Please send a direct message.
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Thank you.
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73,
Michael Smith, N4KZO
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YO-901 Multiscope with Band Scope Wanted
I am looking for a YO-901 Multiscope with the optional band scope, all in excellent or better condition. ?Please send a direct message.
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Thank you.
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73,
Michael Smith, N4KZO
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Re: FT-101 IF Board - Help needed
Thanks Jim for your help!
I fully agree with you, that's the obvious way to go; I only quoted the transistors because I believe this is going to be the main source of difficulties (substitutions, etc).
In the meantime, I located a 'fried' resistor, which was probably the source of the smoke; I will replace it and see what happens next...
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BTW, note that repalcing the PB1080A with a P04-004 on a Sommerkamp Ft-277 doesn't seem to affect the RX quality; at least, I haven't noticed any difference, when comparing to a FT-277E...
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Thanks again to all!
73 - Joseph F4JVO
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Re: FT-101 IF Board - Help needed
The next step SHOULD be troubleshooting with test instruments (and your eyes) to locate the defective part(s). Replacing parts just because they are there can lead to more problems than you started with. On Sun, 08 Sep 2024 01:13:51 -0700 "JsF4JVO via groups.io" <joseph.simantov@...> wrote: So, I suppose the next step will be to replace the 2sc828q transistors (wish me good luck!). -- 73 -Jim NU0C
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Re: FT-101 IF Board - Help needed
Hi Joseph,
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Good luck with the repairs!
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There could be little information on the web as the TS-288A was not made in great quantities, and this is the first time that I have heard of a board that should be in a TS-288A being put into a FT-101. The full manual with schematics for the TS-288A is available on the web if you are interested.
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Another manual I have shows the BC182 as a replacement for the 2SC828Q, but you will need to check the pin designations to make sure it is a good replacement.
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73,
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Peter
G4DJB
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Re: FT-101 IF Board - Help needed
Thanks Peter,?I really appreciate your reply!
I was very surprised about the lack of any information on the web about that board. I even asked a few Swiss OMs, but somehow nothing came out!!!
The main reason I enquired about that board was that the S-meter somehow stopped working; then, I realized that the 500ohm pot was damaged, and when I replaced it, an evil-looking smoke came out of 'somewhere' and the S-meter was still dead...
So, I suppose the next step will be to replace the 2sc828q transistors (wish me good luck!).
Thanks again, have a nice weekend!
73 - Joseph F4JVO?
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Re: FT-101 IF Board - Help needed
Hi Joseph,
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Attaching that schematic to my message didn't work as the quality of the image was degraded. I have placed a copy of the P04-004 schematic into the Files section of the group. The file name is P04-004.jpg.
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73,
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Peter
G4DJB
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Re: FT-101 IF Board - Help needed
Hi Joseph,
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That is very interesting!
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The P04-004 is a valid Sommerkamp board number and is the IF board from the Sommerkamp TS-288A transceiver, which was the Sommerkamp version of the FT-101 with added CB channels.
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This board should be very similar to the PB-1080A and I have attached a schematic of P04-004. I have not checked that these boards are interchangeable, but I believe that they would be. I believe that the original board would have had the Yaesu SSB filter fitted. I do not know why yours has a homebrew filter. Perhaps the original filter was somehow damaged, or a previous owner wished to improve the performance? The early FT-101 and TS-288A were fitted with a 6-pole SSB filter, whereas later models of the FT-101 used an 8-pole filter.
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73,
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Peter
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G4DJB
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Re: FT-101EE Switch Needed --- PLEASE HELP!!
On Ebay, someone in Japan has a lot of 4 slide switches for the 101 series, you might look at see if one of the lot is what you are looking for?
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On Aug 23, 2024, at 2:33?PM, Jerry Purcell <kc9zar@...> wrote:
? Yaesu was absolutely NO help. But I understand because it is an old radio
Funny enough, I'm looking for the same thing. Love to know of sources without having to measure and search.
Phil, VE4STG
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FT-101 IF Board - Help needed
Hi Everyone,
I just joined the group, and am already posting a question, hoping somebody would have some information to share...
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I just acquired (salvaged/got from somebody who wanted to get rid of) an old FT-101 (Sommerkamp FT-277) which I set out to restore; the first thing I noticed was that in place of the PB1080A board, the last owner had installed an unknown board with a marking P04-004 - it looks very similar to the PB1080A, with the NB and a homebrew SSB filter, but the markings of the transistors are long gone... A search on the web has given nothing...
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I was wondering if anybody had any information about this board (link, schematic, etc)
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Many thanks and 73s, Joseph F4JVO
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Re: FT-101EE Switch Needed --- PLEASE HELP!!
Yaesu was absolutely NO help. But I understand because it is an old radio
Funny enough, I'm looking for the same thing. Love to know of sources without having to measure and search.
Phil, VE4STG
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Re: FT-101EE Switch Needed --- PLEASE HELP!!
Funny enough, I'm looking for the same thing. Love to know of sources without having to measure and search.
Phil, VE4STG
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FT-101EE Switch Needed --- PLEASE HELP!!
I'm looking for the slide switch labeled in the schematic as "S8 - SLE12301". This is for the P.O./I.C./ALS
Anyone know of a replacement part number or would happen to have this part I would be very interested.
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Thank You in advance,
Jerry
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Jim Shorney
Fernando Quinones N2FQ
Jerry Purcell