Hello to the Group. Any help would be greatly appreciated.
I have a friend's 2 FT-101E's here and both had essentially the same operational problems, that is both worked well on all modes, Rx & Tx on AM and CW, but no SSB Tx.?
I did get the first one going by cleaning both Relay #1 and the Mode switch. The 2nd runs well both on Rx and TX on AM and CW, but also no SSB TX.
Looking at the Tx signal on my Spectrum Analyser in SSB mode, I can see a minimal carrier (-110dBm or so) and whistling or talking into the mic the signal rises perhaps 10dB or so, but the audio I hear is AM not garbled (not SSB) and no power to speak of. I've gone through this rig pretty rigorously and found several minor problems,? out of tolerance resistors, leaky caps, and Q6 on the PB-1534 which caused a No ALC issue but having replaced it with a similar FET I do now have ALC but still no SSB drive. Bias on the Finals and driver are good (60mA and 20mA), so I'm in at a loss and becoming frustrated. I also swapped out all of the boards and both relays from the working unit to this one and I have the same problem, so it's got to be something that I haven't swapped out, the PB-1534 or the mode switch? Anyone have any idea on what I'm missing here?
Thanks for any assistance.
?
73 de
Claude - VE2YI
ceverton2222@...?
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Re: ft101b HELP with power supply removal
Thanks for your reply, Emerson.? I have the board out and am currently removing and testing components.? Surprisingly the badly charred resistors test right on the money.? Some of the smaller components outside the charred area are dead as doornails.? Go figure.? I will replace everything with obvious damage or that tests as marginal. We'll see how it goes!
73,
Tom. KO4HNB
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Re: ft101b HELP with power supply removal
Tom
It is possible to remove it. It's not easy but I did that.? Probably it is necessary to verify all components.
take a picture and note the position of all the wires
You can loosen the screws on the other side where the plate is fixed. To do this, you have to remove the speaker to access the screws on the support.
Now if I remember correctly these burned resistors belong to the inverter circuit. In other words, the ft101 can work without them.
good luck
Emerson PP6EW
?
Em seg., 25 de mar. de 2024 às 00:17, Tom KO4HNB < alnath14308@...> escreveu:
All-
I bought a cheap Yaesu ft101b to learn about tube HF.? Based on guidance from this board I started it on a dim bulb tester (receive worked), tuned it per manual and service manual (they do not agree, but both tuned it).? Set it for 1/2 power and transmitted into a known resonant 20m dipole.? Got about 60w out. Groovy!? Next day it only received!!!?? Stopped and pulled the case to look for c13 and c125 to replace them if still the originals per instructions here and elsewhere. I found sources saying? this is what happens if C13 fails open.If it fails shorted, fire ensues.? I have had no fire, smoke, or evil smells from the 101.
Opeed case and found this inside (see photos of rectifier board PB1076B.)
This is PB1076B, the rectifier board.? That stuff is not spray on insulation, the components are partially carbonized. And it still receives.? Tough radio.
How do you remove this board?? It appears to have been born in this position and cannot be removed without explosives. Most everything else looks accessible, but not this.? No other damage evident anywhere.
How can I get this board out? Anyone have one to sell? And while I'm asking, where are the C13 and C125's I need to replace?? I have found several with those numbers.
Thanks for any help available.? I think I made or bought a mess.
73,
Tom
KO4HNB
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ft101b HELP with power supply removal
All- I bought a cheap Yaesu ft101b to learn about tube HF.? Based on guidance from this board I started it on a dim bulb tester (receive worked), tuned it per manual and service manual (they do not agree, but both tuned it).? Set it for 1/2 power and transmitted into a known resonant 20m dipole.? Got about 60w out. Groovy!? Next day it only received!!!?? Stopped and pulled the case to look for c13 and c125 to replace them if still the originals per instructions here and elsewhere. I found sources saying? this is what happens if C13 fails open.If it fails shorted, fire ensues.? I have had no fire, smoke, or evil smells from the 101. Opeed case and found this inside (see photos of rectifier board PB1076B.)    This is PB1076B, the rectifier board.? That stuff is not spray on insulation, the components are partially carbonized. And it still receives.? Tough radio. How do you remove this board?? It appears to have been born in this position and cannot be removed without explosives. Most everything else looks accessible, but not this.? No other damage evident anywhere. How can I get this board out? Anyone have one to sell? And while I'm asking, where are the C13 and C125's I need to replace?? I have found several with those numbers. Thanks for any help available.? I think I made or bought a mess. 73, Tom KO4HNB
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Re: FT-101 EE PB1547 Voltages
I replaced the Q3 2SC784, and the B-C-E voltages test good now, so we’re making progress. However still no TX output. After tuning against dummy load, and then connecting to MFJ-904 tuner and antenna, the meter (set on P.O.) shows zero when switched to MOX, but jumps to S7 momentarily, instantly after switch is snapped back to PTT, then slowly settles back to zero.
Vince, KN6KKZ
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Re: FT-101 EE PB1547 Voltages
Emerson,?
Thank you for sharing that BF199 interchange information. I’ll definitely make note of that for future reference. I was able to locate a pair of new original Toshiba 2SC784 that just arrived today. I am anxious to replace it this weekend and see what happens!
Thank you again,
Vince, KN6KKZ?
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Re: FT-101 EE PB1547 Voltages
Vince
I? have replaced Q3 2sc784 by a BF199.
Emerson PP6EW
Em sex., 8 de mar. de 2024 às 11:20, Vincent Fischer < vf6fhellcat@...> escreveu:
Emerson!
Have you led me literally STRAIGHT to the likely source of my TX issue?! Please check out the Q3 transistor base voltages in attached image.
Thank you,
Vince, KN6KKZ
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Re: FT-101 EE PB1547 Voltages
Emerson! Have you led me literally STRAIGHT to the likely source of my TX issue?! Please check out the Q3 transistor base voltages in attached image. Thank you, Vince, KN6KKZ 
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Re: FT-101 EE PB1547 Voltages
Emerson,
Thank you very much for sharing that information! I will certainly dig into the manual and try to learn the procedure to test that component. I have ordered the silver mica caps C13, C11 and C131, as I’ve been told that they should be replaced regardless of how they test. I also ordered a 10pf final neutralizer cap to be prepared to use USA made 6JS6C’s. I have a retired radio/TV shop owner ham friend looking through his tube inventory as we speak.
Thanks again!
Vince, KN6KKZ
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Re: FT-101 EE PB1547 Voltages
Vince
The pin 5 voltage spec is around -150v.? A source of Tx problems is often Q3 (2sc784R) at PB 1181B RF unit.
The attached manual can help you,? Good luck
Emerson PP6EW
Em qua., 6 de mar. de 2024 às 19:54, Vincent Fischer < vf6fhellcat@...> escreveu:
Hello,?
I am new to the FT-101 world and new to the group and new to radio repair in general (and to be clear, I’m NOT an 11meter operator). I recently got my hands on a beautiful old FT-101 EE. It receives perfectly but no TX (3 watts). I have pulled all the boards and carefully cleaned all the contacts. I see no sign of damage or excessive heat in any of the components, with exception of the NEC tubes which both have some pretty dark oval staining inside. No signs of modification in this rig. I have checked the voltages on PB1547, and have found pin #2 at -72v (-60v spec), pin #4 at -21v (-20v spec) and pin #5 at -192v (-100v spec). I’m wondering if that high voltage on pin #5 is an indicator of a specific issue, or with the bias and driver voltages being within reason, could those old tubes have died from “natural causes”. Any feedback is greatly appreciated!
Vince Fischer, KN6KKZ
Ione, Ca.
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FT-101 EE PB1547 Voltages
Hello,?
I am new to the FT-101 world and new to the group and new to radio repair in general (and to be clear, I’m NOT an 11meter operator). I recently got my hands on a beautiful old FT-101 EE. It receives perfectly but no TX (3 watts). I have pulled all the boards and carefully cleaned all the contacts. I see no sign of damage or excessive heat in any of the components, with exception of the NEC tubes which both have some pretty dark oval staining inside. No signs of modification in this rig. I have checked the voltages on PB1547, and have found pin #2 at -72v (-60v spec), pin #4 at -21v (-20v spec) and pin #5 at -192v (-100v spec). I’m wondering if that high voltage on pin #5 is an indicator of a specific issue, or with the bias and driver voltages being within reason, could those old tubes have died from “natural causes”. Any feedback is greatly appreciated!
Vince Fischer, KN6KKZ
Ione, Ca.
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Re: Rs: need help fixing a Yeasu ft-101-es
toggle quoted message
Show quoted text
On Fri, Jan 26, 2024 at 2:27?AM Steven Eizenberg < kc7byp@...> wrote: Hi All. Re: I reasnly got a partly working Yeasu FT-101-ES. I got it asis from a pawn shop. The Pawn shop got the 101 in an estate sale. The 101 came Complete expect for no A/C or DC power cord. I got an A/C power cord from eBay. The A/C
cord arrived about a week ago. the 101 powers up BUT there is very little
sound, just a tinny bit of static and when I turn on my FT-890 HF rig (It works great) to 3.980mhz and turned the antenna switch to the
FT-101-ES and turned the mod on the 101 to tune and moved the ptt
switch to MOX I got a very loud tone out of the transmit on the 101 and about 30 watts power reading on my MFJ-941E tuner with the 101 preselect, plate and load tuned right. I can hear my own voice on the FT-890 when I speak in the mic on the 101. All 3 tube filaments light up. So that tells me that the TX is working up to the
driver tube and probably the finals are putting some power out.? It also tells me that the 3 ganged tuned IF cans haven't been messed with (thank God for that). It has been many years since I last worked on any FT-101 anything. I am going to need some guidance on fixing this rig. All I have for test gear is an old Echo tube driven RF GEN and a Ideal 61-340 digital VOM. I sold my portable tube checker a few years back.
BTW When I tried to TX on the FT-890 I heard NOTHING on the FT-101-ES
?
?
?
From the desk of the Amateur radio station of?KC7BYP
1/24/2024
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Re: need help fixing a Yeasu ft-101-es
Glad it worked out.? Thanks for the feedback.
--
73, KK7JNR
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Re: need help fixing a Yeasu ft-101-es
Hi Dan. I found out why the the reason that the receive isn't working. A suggestion from Alex N7SM at the winter field day. To check the headphone jack. Sure enough I jumped the pines on the back of the headphone jack with an alger clip and I got full sound. But I don't reremember how to get the head phone jack out.
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Re: Rs: need help fixing a Yeasu ft-101-es
Hi Steve, I have the FT-101E but have never heard of the ES.? I checked online to see if any schematics were available but did not locate one.? I did find out the below information about it.? Maybe that's why I'm not finding any documentation on it.? It looks to have been manufactured in the late 70's.? Since you have three tubes your transceiver must have been modified for more power output.? I assume that the input power was changed from 100VAC to the US 120VAC requirement.? Using your VOM you could measure the supply voltages.? A schematic from another model might help verifying if your unit is close to that to determine voltages.? The unit is old enough that you may have high ESR, leaking capacitors throughout.? That should be an easy check to measure some of the smaller caps with an ESR meter and you can do it in circuit as long as the caps have been discharged before measuring.? You mentioned working on these units before, so you probably know all this.? I'm not an expert but plan on powering up my 101E but using a dim bulb tester I need to build.? I bought my Yaesu it the late 70's and would hate to see any smoke as most parts are obsolete.?? Good luck and let us know how it goes.
- The?FT-101ES?was a special FT-101E model for the Japanese market only with a single 6JS6C tube and 50-watt output.
Dan -- 73, KK7JNR
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Rs: need help fixing a Yeasu ft-101-es
Hi All. Re: I reasnly got a partly working Yeasu FT-101-ES. I got it asis from a pawn shop. The Pawn shop got the 101 in an estate sale. The 101 came Complete expect for no A/C or DC power cord. I got an A/C power cord from eBay. The A/C
cord arrived about a week ago. the 101 powers up BUT there is very little
sound, just a tinny bit of static and when I turn on my FT-890 HF rig (It works great) to 3.980mhz and turned the antenna switch to the
FT-101-ES and turned the mod on the 101 to tune and moved the ptt
switch to MOX I got a very loud tone out of the transmit on the 101 and about 30 watts power reading on my MFJ-941E tuner with the 101 preselect, plate and load tuned right. I can hear my own voice on the FT-890 when I speak in the mic on the 101. All 3 tube filaments light up. So that tells me that the TX is working up to the
driver tube and probably the finals are putting some power out.? It also tells me that the 3 ganged tuned IF cans haven't been messed with (thank God for that). It has been many years since I last worked on any FT-101 anything. I am going to need some guidance on fixing this rig. All I have for test gear is an old Echo tube driven RF GEN and a Ideal 61-340 digital VOM. I sold my portable tube checker a few years back.
BTW When I tried to TX on the FT-890 I heard NOTHING on the FT-101-ES
?
?
?
From the desk of the Amateur radio station of?KC7BYP
1/24/2024
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Re: FR-101D with LED display?
Thanks for the info! I uploaded some pictures of the display unit and the restoration. I'm definitely need to find a FL-101 now! HI....
Erwin, PA3DAF
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Re: FR-101D with LED display?
Erwin, I have one of these FR-101’s with the LED’s as well. I have never been able to find any documentation on the LED version either other than verifying these were part of the last production run of the FR-101.? If you do happen to find any additional info on yours, please share with the group. I think these were quite rare. Yours is the only other one I’m aware of.? I also have several FR-101’s with the more common green VFD tubes. Great receiver, (I have mine paired with the matching FL-101).
Tom / W7OA
toggle quoted message
Show quoted text
On Jan 11, 2024, at 10:35, PA3DAF <PA3DAF@...> wrote:
?I recently bought this FR-101D with LED display. It was very dirty inside and outside but with all filters, FM unit and a 2 meter converter. Last weeks I cleaned it thoroughly and everything seems to work but it needs some realignment and the top cover can use some new paint.? But how rare are these? I only find pictures and info of the D versions with the green nixie tubes. I can't find any schematic or manual about his LED version and it's all original Yaesu! Who has more info? <thumbnail_IMG_6035.jpg> Erwin, PA3DAF
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Re: FR-101D with LED display?
Hello Erwin,
I have an FR-101D, together with the matching hybrid transmitter, the FL-101.
My FR-101D has the green display. I have the original manual for it. I bought the pair together with the FL-2000B at an estate sale. The transmitter and the receiver didn't work initially, but after thorough cleaning from accumulated dirt inside and applying contact cleaner to all the switches, potentiometers, and internal connectors, the set works great. I use the setup dedicated to a regional AM net on 80 meters, and I get compliments on the audio quality.
I can scan my manual and make a PDF file I'll be happy to share with you.
73, Meir WF2U
Landrum, SC
On Jan 11, 2024, at 1:35?PM, PA3DAF < pa3daf@...> wrote:
I recently bought this FR-101D with LED display. It was very dirty inside and outside but with all filters, FM unit and a 2 meter converter. Last weeks I cleaned it thoroughly and everything seems to work but it needs some realignment and the top cover can use some new paint.? But how rare are these? I only find pictures and info of the D versions with the green nixie tubes. I can't find any schematic or manual about his LED version and it's all original Yaesu! Who has more info?
Erwin, PA3DAF
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Re: FR-101D with LED display?
Hi,
I’ve just checked my FR101D and it has a green display, I too have an FL101 and the FR101D, I also have a standard FR101 analogue display. The only thing I can’t find is the 5 pin plug for the cable end. Thinking of using Din socket and plug.
Regards
Amanda
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Claude VE2YI
Tom ai4th
Vince, KN6KKZ
