Re: FT-101E power out and receive don't peak at the same point
Thank you for the information.? It confirms what I was thinking.??
73,
Steve - N9SB
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Re: FT-101E power out and receive don't peak at the same point
Yeah Steve a simple alignment should correct your issue. Manual has complete details.? Good luck.? Todd AL7PX
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Re: Distorted Transmitted Audio 20 meters & Up
Hello Gordan:
Yes, I did have distortion and I figured out the cause. It was my mistake. I was using another transceiver to monitor the audio and discovered the mode setting was wrong in that radio. The radio was a Yaesu 891. I'm not very familiar with that radio. The radio was in RTTY mode on those bands and I didn't realize it. Kinda embarrassing. Anyway, all seems better now and I will continue to go through the radio. Thanks for your reply.
73,
Todd
AL7PX??
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Re: Distorted Transmited Audio 20 meters & Up
Hi Todd,
It could be the 6146 output valves have gone soft. It's common for them to drop? output power on the higher frequencies when they do. In that case, you could be over driving them on the higher bands. Possibly worth looking at your output power when tuned up to see if it is significantly lower on 15, 12 and 10. It's normal for it to be a bit lower on the higher bands, but it should still be say 80-90% of the output on 20.
73 Gordon G8WWD?
Hi Todd! Are you using a dummy load for these tests or are you on antennas?? You know about some microphones picking up RF from antenna feedlines? I hear that commonly on 80 and 40 metres.
There are other sources of distortion within the audio stages of the FT-101 as well. You may need to trouble shoot. Keep us posted on all the symptoms! Gord, VE5UJ
On Tuesday, March 14, 2023 at 11:24:38 a.m. CST, Todd AL7PX via <ic7461= [email protected]> wrote:
I have a problem with my 101B transmitting audio. The lower bands (80,40) audio sounds clean but 20 meters it starts to distort and gets worse further in upper bands. 10 meters is the worse. Has anyone experienced this condition or what might be causing the issue? I'm using another receiver to monitor the signal.?
Todd
AL7PX
--
Gord. VE5UJ
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FT-101E power out and receive don't peak at the same point
I recently acquired a FT-101E in very good physical condition. ?It appears to tune up to full output power. ?The issue is that full power out and receive do not peak at the same point on the preselector. ?Does this sound like an alignment issue or is there something else I need to be investigating?
Thanks in advance,
Steve
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Re: Distorted Transmitted Audio 20 meters & Up
Hi Todd! Are you using a dummy load for these tests or are you on antennas?? You know about some microphones picking up RF from antenna feedlines? I hear that commonly on 80 and 40 metres.
There are other sources of distortion within the audio stages of the FT-101 as well. You may need to trouble shoot. Keep us posted on all the symptoms! Gord, VE5UJ
On Tuesday, March 14, 2023 at 11:24:38 a.m. CST, Todd AL7PX via groups.io <ic7461@...> wrote:
I have a problem with my 101B transmitting audio. The lower bands (80,40) audio sounds clean but 20 meters it starts to distort and gets worse further in upper bands. 10 meters is the worse. Has anyone experienced this condition or what might be causing the issue? I'm using another receiver to monitor the signal.?
Todd
AL7PX
-- Gord. VE5UJ
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FT101ZD Mk1 AM RX but no SSB/CW
Hello fellow boat anchor enthusiasts. I have here a very clean FT101ZD Mk 1 recently donated by a colleague. It arrived with him with a known no TX fault. I have not done any TX tests yet. Just trying to get it to receive at the moment. The set only receives on AM - not on SSB / CW. There has been some work done on this set over the years so some red herrings may be in there somewhere. This set used to have RX on all bands but very unstable, (fast frequency jitter). I have been told that after pulling and replacing the three plug in boards, (RF unit, Pre-mix unit, Pre-mix local unit), the set went deaf to all but AM, . All co-ax connections checked OK and in the correct positions. Card slot pins all look fine. No busted tracks on pcb's.
Clues:
Clearly audible hiss in speaker on all non-working modes. AF PA good.
Very quiet SSB heard among the hiss with NB on and AF volume all the way up. Very unstable by the sound of it. Almost inaudible but it is there. Could just be induced across loom somewhere.
Dim control at full bright drops hiss volume a little bit. (12V rail).
All power rails check OK on Rect. A and Rect. B boards. 8V present on all mode settings at J1, AF pcb, pins 1,2,3 and 4.
3rd digit from left on display non functional, (Possibly Q10 or Q4 on display pcb - will tackle this later. Swapped segments and fault stays at position 3). Herring. It did this before going deaf.
When turning the RF gain with ALC off the AM RX is only present in one position. Increasing RF gain knocks out the signal again. There is only one "sweet spot" as it were.
AM signal sounds very over modulated. Better with ALC on.
Relays click in and out briefly sometimes when switching out of AM mode. (VOX? "clunk" through PA?). Possible herring.
Checked Q13, Q14, (FET), and Ge diodes D2 to D5 on AF pcb - all OK.
Continuity through relay on AF pcb OK.
There is a very slight hum in the speaker with volume down. This has occurred since set went deaf. 8V regulator on lower chassis side rail gets a little warm but nothing alarming. Steady 8V out for 12V input.
Clarifier seems to only shift one way on RX.
ATT switch scratchy but common to all modes, (I think), so doesn't explain lack of SSB / CW.
The pre-select control seems to need very little adjustment over each band to pull in AM stations compared to my Mk3. Fishy but also possibly non-herring.
Rotary band and mode switches cleaned and seem to be working fine. No crunching / crackling when wiggled.
Looks like more than one fault here. If I can get the SSB / CW RX back I can then tackle the frequency instability issue. Maybe it will even transmit one day!
Many hours spent with service manual and trying to understand all the frequency conversion stages in this set. Took me years to figure out what an IF actually is!
Very aware of 900V / 300V and how to discharge it before working on set. I'm 56 and still here!
Any input / advice most appreciated. I have a working Mk3 but loathed to start board swapping just for the sake of it. These sets are a real gem so it would be great to revive another one.
Thanks in advance. Have a good day everyone.
David, M0LFD
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Re: New FT-101ZD owner w/ issues: NO TX/RX, digital display won't change freq ..
Page 6 of User Manual and page 1-8 of Service Manual both show ACC plug with link
Note:? It is very easy to touch the feed through caps with 300v on them with a finger at same time touching the chassis !
George, G8AOJ
Alrighty Update-? ?I found the ACC plug. Was staring right at me.? ?Will report back on the progress , thanks again!?
-- George Smith? - RSGB, Dean Forest Railway, H&GCT & Cotswold Canals Trust member
?
Tel:? 01594 835 736 (home)
?
?
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Re: New FT-101ZD owner w/ issues: NO TX/RX, digital display won't change freq ..
Alrighty Update-? ?I found the ACC plug. Was staring right at me.? ?Will report back on the progress , thanks again!?
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Re: New FT-101ZD owner w/ issues: NO TX/RX, digital display won't change freq ..
Hi Greg,?
Appreciate your input.? Do you know of a commercially available 11 pin plug/link by any chance?? I am looking through the owner's manual online for the 'ZD' and cannot find a mention of a link or plug that enables the RX/TX or use of the digital display.? The text description of the display only talks about the wiring within the chassis but no plug/link.? Perhaps I am not seeing it.? Will investigate further into this.??
10-4 on the HV present within the chassis, I'll treat this just I do amplifiers with the upmost caution to ensure the HV is dissipated and the "one hand in pocket" technique my grandfather shared with me back in the day.?
My understanding is the tubes DO power on though.? Which is odd if a link/plug was needed.? Would you mind pointing me in the right direction within the manual or the schematic?? Thank you, sir!?
~Bryan?
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Re: New FT-101ZD owner w/ issues: NO TX/RX, digital display won't change freq ..
Needs a link in ACC socket on rear panel to transmit.
You will need an 11 pin plug. Link pins? 1-2 to get the heaters to power.? Tube will no light otherwise.
If the RX gives sound output and the tuning knob (VFO) will find stations - investigate the display unit.?
If noise out but no stations check the RF input fuse (bulb) then the oscillators. If nothing out? not even noise check the audio stages first.
BEWARE:? The HT (900 volts dc) is always ON even if the heater switch is OFF and in the transceiver is in receive mode.? 900v and 300v present on the underside of the chassis and in the PA compartment.? Beware of the 300v on the feed through capacitors on the driver compartment.? It bites !? 900v present on the RECT B board and transformer tags.
Good Luck
George,? G8AOJ (UK)
Hello everyone from Colorado!?
For years been wanting to get a FT 101.? My grandfather had several 101's since the 50's but when he exited the hobby 15 years ago, sold them all.? To me the 101 is a handsome rig and remembering my grandfather operate his brings back great memories.?
I found a FT-101ZD in FL several days with some issues.? Its SN is: 9F-060716 which makes it an April 79' rig and a MK0 "ZD".? The radio powers on and "tubes light" but with no TX or RX.? The display stays stuck at 0.200.0 and won't change frequencies either. I am still waiting to receive the radio but I would like to get a "head start" ..? Although considered a "hybrid" radio, it still is HUGELY mechanical. My first thoughts are perhaps the rod/linkages might be busted.. * maybe *.
I have ordered the service manual and owner's manual as well and waiting on those as well. Might you fine folks here chime care to share your thoughts, experiences etc.? I would certainly appreciate it.??
73?
Bryan, KB9UZO?
? 
-- George Smith? - RSGB, Dean Forest Railway, H&GCT & Cotswold Canals Trust member
?
Tel:? 01594 835 736 (home)
?
?
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New FT-101ZD owner w/ issues: NO TX/RX, digital display won't change freq ..
Hello everyone from Colorado!?
For years been wanting to get a FT 101.? My grandfather had several 101's since the 50's but when he exited the hobby 15 years ago, sold them all.? To me the 101 is a handsome rig and remembering my grandfather operate his brings back great memories.?
I found a FT-101ZD in FL several days with some issues.? Its SN is: 9F-060716 which makes it an April 79' rig and a MK0 "ZD".? The radio powers on and "tubes light" but with no TX or RX.? The display stays stuck at 0.200.0 and won't change frequencies either. I am still waiting to receive the radio but I would like to get a "head start" ..? Although considered a "hybrid" radio, it still is HUGELY mechanical. My first thoughts are perhaps the rod/linkages might be busted.. * maybe *.
I have ordered the service manual and owner's manual as well and waiting on those as well. Might you fine folks here chime care to share your thoughts, experiences etc.? I would certainly appreciate it.??
73?
Bryan, KB9UZO?
?
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Re: FT-101B Parts 2,3,4 schematics
Nothing yet.? My qrz.com email address is:
kn7sfz@...
Same one I use to receive on this list...perhaps try again?
Richard
On 2/27/2023 11:56 AM, Todd AL7PX via
groups.io wrote:
toggle quoted message
Show quoted text
Hi Richard:
Sent you a email to your QRZ address.
Todd
AL7PX
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Re: FT-101B Parts 2,3,4 schematics
Hi Richard:
Sent you a email to your QRZ address.
Todd
AL7PX
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Re: FT-101B Parts 2,3,4 schematics
Well, I see it was reduced to an unusable size,
so shoot me an email Todd and I get it to you.
Lots more files here on Facebook:
kn7sfz
On 2/27/2023 11:44 AM, Richard kn7sfz
via groups.io wrote:
toggle quoted message
Show quoted text
Hi Todd,
Here is a full schematic from the Facebook FT-101 group.? It's 6
megs, so hope it makes it or if not, email me direct at:
kn7sfz@...
Richard kn7sfz
On 2/27/2023 11:32 AM, Todd AL7PX via
groups.io wrote:
I can't find part 2 or more parts to the full schematic for the
101B files. Part 1 full schematic is listed but no further. Is
it located somewhere else?
The copies are the best I've seen and would like the full
schematic set. Does anyone have the other parts?
Todd
AL7PX
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Re: FT-101B Parts 2,3,4 schematics
Hi Todd,
Here is a full schematic from the Facebook FT-101 group.? It's 6
megs, so hope it makes it or if not, email me direct at:
kn7sfz@...
Richard kn7sfz
On 2/27/2023 11:32 AM, Todd AL7PX via
groups.io wrote:
toggle quoted message
Show quoted text
I can't find part 2 or more parts to the full schematic for the
101B files. Part 1 full schematic is listed but no further. Is it
located somewhere else?
The copies are the best I've seen and would like the full
schematic set. Does anyone have the other parts?
Todd
AL7PX
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FT-101B Parts 2,3,4 schematics
I can't find part 2 or more parts to the full schematic for the 101B files. Part 1 full schematic is listed but no further. Is it located somewhere else?
The copies are the best I've seen and would like the full schematic set. Does anyone have the other parts?
Todd
AL7PX
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Hello Bruce:
D13 was bad. I also put a better trimmer for the adjustment.?
Todd
AL7PX
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Which diode was bad Todd??
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G8AOJ
wheelz
Bruce Collins