Re: New Final Tubes.. How to Neutralize?
I used both methods (hot and cold) and prefer the 'cold' method. If you don't have a scope or just a simple AM radio to monitor RF output then a Germanium diode terminated with a resistor would do the trick.
Have a look here for the circuitry.?
Jose,
I prefer the " cold neutralization " method by removing the ACC plug in the back to remove the heaters from the finals. Do you have a multimeter and a RF probe? If you don't have a probe, do you have a diode? You can measure the RF voltage at the antenna connector with a diode in series with the multimeter on DC volts. It is best to have a dummy load on the rig, not because you will be transmitting, just so it is terminated by 50 ohms during the neutralization. This method doesn't risk your finals and I have found it to work well.?
73 Don ve3ids?
On Tue., Mar. 28, 2023, 2:21 p.m. Jose - KK7HSA, < palazuelos@...> wrote: Good day FT101ers...? I have a FT-101EE that is due for Final replacements as I only can get 40W out of the rig right now and I got myself a pair of 6JS6C Tubes that were tested in a tube checker to be 95% good life.
Im reading the service manual page 4-12 were it talks about the neutralization, and get conflicting videos on youtube on how to perform this procedure.? ?In One it has the use of an oscilloscope (which I don't have) and the second one using a second radio (Which I also don't have)?
Has anyone experienced problems using the method from the service manual, or has perhaps recorded a video of a neutralization effort per manual on youtube?
Thanks
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Re: New Final Tubes.. How to Neutralize?
Jose,
I prefer the " cold neutralization " method by removing the ACC plug in the back to remove the heaters from the finals. Do you have a multimeter and a RF probe? If you don't have a probe, do you have a diode? You can measure the RF voltage at the antenna connector with a diode in series with the multimeter on DC volts. It is best to have a dummy load on the rig, not because you will be transmitting, just so it is terminated by 50 ohms during the neutralization. This method doesn't risk your finals and I have found it to work well.?
On Tue., Mar. 28, 2023, 2:21 p.m. Jose - KK7HSA, < palazuelos@...> wrote: Good day FT101ers...? I have a FT-101EE that is due for Final replacements as I only can get 40W out of the rig right now and I got myself a pair of 6JS6C Tubes that were tested in a tube checker to be 95% good life.
Im reading the service manual page 4-12 were it talks about the neutralization, and get conflicting videos on youtube on how to perform this procedure.? ?In One it has the use of an oscilloscope (which I don't have) and the second one using a second radio (Which I also don't have)?
Has anyone experienced problems using the method from the service manual, or has perhaps recorded a video of a neutralization effort per manual on youtube?
Thanks
|
New Final Tubes.. How to Neutralize?
Good day FT101ers...? I have a FT-101EE that is due for Final replacements as I only can get 40W out of the rig right now and I got myself a pair of 6JS6C Tubes that were tested in a tube checker to be 95% good life.
Im reading the service manual page 4-12 were it talks about the neutralization, and get conflicting videos on youtube on how to perform this procedure.? ?In One it has the use of an oscilloscope (which I don't have) and the second one using a second radio (Which I also don't have)?
Has anyone experienced problems using the method from the service manual, or has perhaps recorded a video of a neutralization effort per manual on youtube?
Thanks
|
Re: Early FT101 Serial Numbers
Hello All
Thanks for the clarification!¡Yes of course it is ¡®71 not ¡®91¡.I missed that too?
73
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On 17 Mar 2023, at 10:58, Don VE3IDS <ve3ids.don@...> wrote:
? Todd,
You are correct. A typo on my part. I was thinking 71 but for some reason hit 91. I have a E model built in 1975.? Sorry for the confusion.?
73 Don ve3ids? On Fri., Mar. 17, 2023, 10:51 a.m. Todd AL7PX via , <ic7461= [email protected]> wrote: They didn't build 101's in 1991. The early 101's were built in the early 70's. Your rig was built in 1971. I have a "B" model built in 1974.?
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Re: Early FT101 Serial Numbers
Todd,
You are correct. A typo on my part. I was thinking 71 but for some reason hit 91. I have a E model built in 1975.? Sorry for the confusion.?
73 Don ve3ids?
On Fri., Mar. 17, 2023, 10:51 a.m. Todd AL7PX via , <ic7461= [email protected]> wrote: They didn't build 101's in 1991. The early 101's were built in the early 70's. Your rig was built in 1971. I have a "B" model built in 1974.?
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Re: Early FT101 Serial Numbers
They didn't build 101's in 1991. The early 101's were built in the early 70's. Your rig was built in 1971. I have a "B" model built in 1974.?
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Re: Early FT101 Serial Numbers
Hi Don
My apologies I just recognized the link that you sent¡exactly what I was looking for!???
Thank you !!!
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On 16 Mar 2023, at 17:59, Don VE3IDS <ve3ids.don@...> wrote:
? Steve,
I would say that your FT 101 was built in November of 1991.?
73 Don ve3ids? On Thu., Mar. 16, 2023, 4:17 p.m. STEPHEN WIDDETT via , <stevewiddett= [email protected]> wrote: Hello All
I am trying to understand the serial number on my FT101:
1M117016
I have been able to establish from the PCB number reference list that this is an early 25,000 or under model.
Does the 1M/1M11 have a meaning?
Is this then model number 17016?
Any guidance appreciated!
73
Steve
W8SAW
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Re: Early FT101 Serial Numbers
Hi Steve,
That is the way I read it. That jives with when the FT 101 was produced. Have fun with it. They are a nice old classic.?
73 Don ve3ids?
On Thu., Mar. 16, 2023, 6:18 p.m. STEPHEN WIDDETT via , <stevewiddett= [email protected]> wrote: Hi Don
Thanks for your response.!
So is this how to interpret:
1=91 M11=November 7016 is the serial number
Correct?
Thanks
Steve ? Steve,
I would say that your FT 101 was built in November of 1991.?
73 Don ve3ids? On Thu., Mar. 16, 2023, 4:17 p.m. STEPHEN WIDDETT via , <stevewiddett= [email protected]> wrote: Hello All
I am trying to understand the serial number on my FT101:
1M117016
I have been able to establish from the PCB number reference list that this is an early 25,000 or under model.
Does the 1M/1M11 have a meaning?
Is this then model number 17016?
Any guidance appreciated!
73
Steve
W8SAW
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Re: Early FT101 Serial Numbers
Hi Don
Thanks for your response.!
So is this how to interpret:
1=91 M11=November 7016 is the serial number
Correct?
Thanks
toggle quoted message
Show quoted text
On 16 Mar 2023, at 17:59, Don VE3IDS <ve3ids.don@...> wrote:
? Steve,
I would say that your FT 101 was built in November of 1991.?
73 Don ve3ids? On Thu., Mar. 16, 2023, 4:17 p.m. STEPHEN WIDDETT via , <stevewiddett= [email protected]> wrote: Hello All
I am trying to understand the serial number on my FT101:
1M117016
I have been able to establish from the PCB number reference list that this is an early 25,000 or under model.
Does the 1M/1M11 have a meaning?
Is this then model number 17016?
Any guidance appreciated!
73
Steve
W8SAW
|
Re: Early FT101 Serial Numbers
Steve,
I would say that your FT 101 was built in November of 1991.?
73 Don ve3ids?
On Thu., Mar. 16, 2023, 4:17 p.m. STEPHEN WIDDETT via , <stevewiddett= [email protected]> wrote: Hello All
I am trying to understand the serial number on my FT101:
1M117016
I have been able to establish from the PCB number reference list that this is an early 25,000 or under model.
Does the 1M/1M11 have a meaning?
Is this then model number 17016?
Any guidance appreciated!
73
Steve
W8SAW
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Re: How to align frequencies?
Just reach in behind the viewing glass and rotate the white 500KHz disk to where you want it. It is not really tightly mounted to the shaft.?
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Re: How to align frequencies?
Mine is the same way. The dial needle is actually on the other side (zero end) KHz mark slightly. The dial (back) behind the line doesn't track perfectly I've found from one extreme to the other in the 500 kHz VFO. The 102 had a better calibration. I'm use to it now.
Todd
AL7PX
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Early FT101 Serial Numbers
Hello All
I am trying to understand the serial number on my FT101:
1M117016
I have been able to establish from the PCB number reference list that this is an early 25,000 or under model.
Does the 1M/1M11 have a meaning?
Is this then model number 17016?
Any guidance appreciated!
73
Steve
W8SAW
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How to align frequencies?
Having some minor issue with the Main Tunning Dial. When calibration for the 100s (x.400) frequency in this case, Im almost 15-20 off from the visual mark. Anyway to correct this easily ?? Thx ?
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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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Don VE3IDS
STEPHEN WIDDETT
Bruce Collins