Nestor,,thanks so much, turns out the channel,switch was dirty ,,the one next to ic/alc/ switch, working of now .thx again 4 your help.Brian.
On Tue, Apr 29, 2025 at 6:22 AM Nestor Noguera via <nogueras= [email protected]> wrote: Hello Brian, The attached schematic contains the PB1547 regulator circuit. Nestor VE7RSN
Nestor the board is PB1547 Regulator. Thx Nestor ,
Turns out it was c11 dead short, burning out r40.
I am presently working on another 101 , the first one is a 101b, the one I am working on now is a 101e, and I am having problems as the regulator board is not the same as the schematics I have , the 6 volt rail on the VFO is not lighting a 6 volt rail, and falls to o volts on transmit,,the regulator is a pb 1547 or similar number, but different to the 101 b .
Is it possible to,obtain a circuit of this model ,with the different regulator, 101e, there must have been differences in these as they came out , and hard to repair without a circuit, I was trying to see which PIN number is feeding the 6 volt output,,and where does the voltage for this rail,come from, I see 13 .5 volts on I think pin 12 , but there must be a problem some where as no power in the 6 volt rail, it,lites the led and that¡¯s about all, the PNP transistor checks out ok , and seems to,feed into an ic,but with out a circuit im at a loss to know what¡¯s going on, if you have any info ide like to hear back from you.Brian .VK4PX. On Mon, Apr 28, 2025 at 3:31 PM Nestor Noguera via <nogueras= [email protected]> wrote: Check C109 connected to R40 nearby for possible short.
Nestor
VE7RSN
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On Tue, Apr 29, 2025 at 6:22 AM Nestor Noguera via <nogueras= [email protected]> wrote: Hello Brian, The attached schematic contains the PB1547 regulator circuit. Nestor VE7RSN
Nestor the board is PB1547 Regulator. Thx Nestor ,
Turns out it was c11 dead short, burning out r40.
I am presently working on another 101 , the first one is a 101b, the one I am working on now is a 101e, and I am having problems as the regulator board is not the same as the schematics I have , the 6 volt rail on the VFO is not lighting a 6 volt rail, and falls to o volts on transmit,,the regulator is a pb 1547 or similar number, but different to the 101 b .
Is it possible to,obtain a circuit of this model ,with the different regulator, 101e, there must have been differences in these as they came out , and hard to repair without a circuit, I was trying to see which PIN number is feeding the 6 volt output,,and where does the voltage for this rail,come from, I see 13 .5 volts on I think pin 12 , but there must be a problem some where as no power in the 6 volt rail, it,lites the led and that¡¯s about all, the PNP transistor checks out ok , and seems to,feed into an ic,but with out a circuit im at a loss to know what¡¯s going on, if you have any info ide like to hear back from you.Brian .VK4PX. On Mon, Apr 28, 2025 at 3:31 PM Nestor Noguera via <nogueras= [email protected]> wrote: Check C109 connected to R40 nearby for possible short.
Nestor
VE7RSN
|
Hello Brian, The attached schematic contains the PB1547 regulator circuit. Nestor VE7RSN
Nestor the board is PB1547 Regulator. Thx Nestor ,
Turns out it was c11 dead short, burning out r40.
I am presently working on another 101 , the first one is a 101b, the one I am working on now is a 101e, and I am having problems as the regulator board is not the same as the schematics I have , the 6 volt rail on the VFO is not lighting a 6 volt rail, and falls to o volts on transmit,,the regulator is a pb 1547 or similar number, but different to the 101 b .
Is it possible to,obtain a circuit of this model ,with the different regulator, 101e, there must have been differences in these as they came out , and hard to repair without a circuit, I was trying to see which PIN number is feeding the 6 volt output,,and where does the voltage for this rail,come from, I see 13 .5 volts on I think pin 12 , but there must be a problem some where as no power in the 6 volt rail, it,lites the led and that¡¯s about all, the PNP transistor checks out ok , and seems to,feed into an ic,but with out a circuit im at a loss to know what¡¯s going on, if you have any info ide like to hear back from you.Brian .VK4PX. On Mon, Apr 28, 2025 at 3:31 PM Nestor Noguera via <nogueras= [email protected]> wrote: Check C109 connected to R40 nearby for possible short.
Nestor
VE7RSN
|
Nestor the board is PB1547 Regulator.
Thx Nestor ,
Turns out it was c11 dead short, burning out r40.
I am presently working on another 101 , the first one is a 101b, the one I am working on now is a 101e, and I am having problems as the regulator board is not the same as the schematics I have , the 6 volt rail on the VFO is not lighting a 6 volt rail, and falls to o volts on transmit,,the regulator is a pb 1547 or similar number, but different to the 101 b .
Is it possible to,obtain a circuit of this model ,with the different regulator, 101e, there must have been differences in these as they came out , and hard to repair without a circuit, I was trying to see which PIN number is feeding the 6 volt output,,and where does the voltage for this rail,come from, I see 13 .5 volts on I think pin 12 , but there must be a problem some where as no power in the 6 volt rail, it,lites the led and that¡¯s about all, the PNP transistor checks out ok , and seems to,feed into an ic,but with out a circuit im at a loss to know what¡¯s going on, if you have any info ide like to hear back from you.Brian .VK4PX. On Mon, Apr 28, 2025 at 3:31 PM Nestor Noguera via <nogueras= [email protected]> wrote: Check C109 connected to R40 nearby for possible short.
Nestor
VE7RSN
|
Thx Nestor ,
Turns out it was c11 dead short, burning out r40.
I am presently working on another 101 , the first one is a 101b, the one I am working on now is a 101e, and I am having problems as the regulator board is not the same as the schematics I have , the 6 volt rail on the VFO is not lighting a 6 volt rail, and falls to o volts on transmit,,the regulator is a pb 1547 or similar number, but different to the 101 b .
Is it possible to,obtain a circuit of this model ,with the different regulator, 101e, there must have been differences in these as they came out , and hard to repair without a circuit, I was trying to see which PIN number is feeding the 6 volt output,,and where does the voltage for this rail,come from, I see 13 .5 volts on I think pin 12 , but there must be a problem some where as no power in the 6 volt rail, it,lites the led and that¡¯s about all, the PNP transistor checks out ok , and seems to,feed into an ic,but with out a circuit im at a loss to know what¡¯s going on, if you have any info ide like to hear back from you.Brian .VK4PX.
On Mon, Apr 28, 2025 at 3:31 PM Nestor Noguera via <nogueras= [email protected]> wrote: Check C109 connected to R40 nearby for possible short.
Nestor
VE7RSN
|
Check C109 connected to R40 nearby for possible short.
Nestor
VE7RSN
|
Hi all,,
Working on a very nice 101e, unfortunatly , R40 is burnt to a crisp, does any one have ny idea what the cause may be , meter tells me there is a dead short on the output side , 300 volts is on the input . Brian. VK4 PX.
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Re: FT101E ALC / SSB help please
Radio is on the air and working.
Rewired the mic cable and changed out both relays.
Life is good!
Tom
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Re: FT101E ALC / SSB help please
More information:
AM - No audio out. Producing a carrier.
CW - It makes the tone nose, but it is not keying the radio.
SSB - No audio or power out. No ALC indications.
So, I have multiple issues here.
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Re: FT101E ALC / SSB help please
Thank you. The receiver is working fine. I replaced both relays so it's down to the ALC.
The service manual is referencing me to the 1534 module on the top of the radio...there are several voltages I need to measure...Also, the light fuse in the back in not lighting up...so I'm assuming it is blown. From what I read, I thought that would shut of something...the number 1 and 2 wires are connected in the back.
More research...
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Re: FT101E ALC / SSB help please
Hi Tom,
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When the meter switch is set to ALC and you PTT, the meter should go to full scale at 5. ? The meter will deflect down scale from 5 depending on how loud you speak into the mic. ?The downward meter spikes indicate decrease in gain depending the peaking of your audio.
If you don¡¯t see the dipping of the ALC when you are speaking then you may have to look at the ALC circuit underneath the PA tubes.
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Ed. KN6NZW
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Re: FT-101B transmits 20 kHz off frequency
CLARIFIER ADJUSTMENT
The frequencies should coincide at CLARIFIER control OFF and 0 posi
tions In the receive mode . If not, adjust potentiomeTer VR4 located near
the clar ifier control potentiometer under the matn chassis until they do .
<See Fig. 7- 6).
Transmitter and receiver frequencies should coincide at the CLARIFiER
control OFF position. If not, adjust the ZERO potentiomeTer VR4 on PB1314A.
(This is VR3 on PB1547- see pages 5-22 and 5-33).
toggle quoted message
Show quoted text
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From: [email protected] [mailto:[email protected]]
On Behalf Of Stephen Curtis via groups.io
Sent: Sunday, 13 April 2025 9:52 PM
To: [email protected]
Subject: [Yaesu-FT-101] FT-101B transmits 20 kHz off frequency
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Hello all ... any advice gratefully accepted. ?Transmits approx 20kHz above receive frequency. ?Clarifier seems to work correctly . ?Do I start on the power board? ?Thanks
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Re: FT-101B transmits 20 kHz off frequency
Sadly no help ....my clarifier voltage round about 1.6V not the
4.8 V in video.? My VFO jumps 20kHz on MOX or when I turn the
clarifier ON and zero it in the middle.? Beginning to suspect D13
adjacent to the clarifier control???
On 15/4/2025 3:56 pm, Geoffrey
Bridgland via groups.io wrote:
?
?
From:
[email protected] [mailto:[email protected]] On
Behalf Of Stephen Curtis via groups.io
Sent: Sunday, 13 April 2025 9:52 PM
To: [email protected]
Subject: [Yaesu-FT-101] FT-101B transmits 20 kHz off
frequency
?
Hello all ... any advice gratefully
accepted. ?Transmits approx 20kHz above receive frequency.
?Clarifier seems to work correctly . ?Do I start on the
power board? ?Thanks
--
Stephen VK3CAX Melbourne
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Re: FT-101B transmits 20 kHz off frequency
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Stephen Curtis via groups.io
Sent: Sunday, 13 April 2025 9:52 PM
To: [email protected]
Subject: [Yaesu-FT-101] FT-101B transmits 20 kHz off frequency ? Hello all ... any advice gratefully accepted. ?Transmits approx 20kHz above receive frequency. ?Clarifier seems to work correctly . ?Do I start on the power board? ?Thanks
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FT-101B transmits 20 kHz off frequency
Hello all ... any advice gratefully accepted. ?Transmits approx 20kHz above receive frequency. ?Clarifier seems to work correctly . ?Do I start on the power board? ?Thanks
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FT-101ZD VFO-Unit Assembly Gasket
In the process of removing the VFO unit to clean and re-lubricate the reduction vernier, apparently the gasket between the VFO unit and the front panel broke in two places. ?I don¡¯t see any reference in the manuals to identify a part number so to see if Yaesu might have stock. ?This gasket provides a seal along the VFO unit edge, and I would like to replace it, if possible. ?Please let me know if you have any information or suggestions to replace the gasket.
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Thank you,
Michael Smith, N4KZO
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Re: Yaesu ft-101b, looking for board pb-1186 on schematic
There is a seller on ebay that apparently has 11 of them for about $13 each.? I could not find the schematic in my files, and even FoxTango came up empty...
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Good luck!
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Tom ai4th
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Re: My FT-101F with front panel model # as a STICKER (?????)
Is this what you mean? My FT101b has no raised lettering either. I thought this was normal.
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73,
Tom ai4th
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Re: My FT-101F with front panel model # as a STICKER (?????)
Okay, here's a couple of pics of a FT-101FX dial bezel. I tried to capture the non-embossed nature of the lettering.
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Jim
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Replacing the RL1 Relay with a Magnecraft W67RCSX-12 Relay
Hi All,
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The issue I had with the original RL1 relay in my FT-101 is that the meter circuit was not working due to the relay.? I had cleaned it a few times bit did not correct the problem but it made it worse.? I decided to replace the relay with a Magnecraft W67RCSX-12 relay as per written in an article on the Fox Tango website by Wayne N4YI.? (Thank you Wayne!)
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I just completed the RL1 modification in which I replaced the original AE-3271 relay with a Magnecraft W67RCSX-12 relay.
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The image below is my write up of what I did using Wayne N4YI article.
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The original article was for a FT-101E, so I compared the schematics for my FT-101 (late, pre B model) to the FT-101E and found that Yaesu did not change the harness wiring for RL1.? After making the wiring change my FT-101 meter now works.? The receiver checked out and I did a transmit test by loading the the transmitter up on 20 meters into a dummy load and checking the audio modulation on one of my other radios.? It appears the mod with the new relay works.?
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I am posting this info for anyone interested, but as a disclaimer you do it at your own risk!
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?73
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Ed KN6NZW
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Cusso550
Ed KN6NZW
Claude VE2YI
Tom ai4th
