Re: Yaesu FT450 final transistor issues?
I have had two and still have one 450, never had a problem with the finials.
Troy
ke4ska
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Re: Full Duty Cycle radios
I have used an FT-950, FTDX-3000, and FTDX-101D running SSTV, AM, and RTTY at full power with no issues. AM ran with a 25-watt carrier. If I am running a contest, I use an amplifier even if low power (100 or 150 watts) to keep the transceiver cool. The FTDX-101D has a setting to show transmitter temperature. Even running high duty cycles at 100 watts, the internal fan keeps it below 45C. I had an Icom IC-7610 for a while (not any more), and it worked OK for high duty cycle modes. FT-8 is a 43% duty cycle.?
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Carl? KB7AZ?
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Re: Full Duty Cycle radios
So, how would one know if there was a problem with the finals?? Is there a test to see if they are OK?
?
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From: [email protected] <[email protected]>
On Behalf Of Larry Patten via groups.io
Sent: Tuesday, January 28, 2025 6:00 PM
To: [email protected]
Cc: [email protected]
Subject: Re: [Yaesu-Amateur-Radio] Full Duty Cycle radios
?
The way I look at it is it is not about specs it is about heat. ?That is why I love the temperature meter on the Ftdx101mp. ?I think most of the recent radios from Yaesu have that as part of the meter. ? Just turn on the temperature meter
and watch what happens with the temperature of the final. ?Keep that within specs and you will be fine. ?I do the same with my Flex 6400 although in that case I had to add on some software that puts a meter on the screen that shows the temperature of the finals.
?I don’t think ft8 is exactly 50% duty cycle in that the temperature during receive never goes quite back to normal after transmit. ?Additionally you will see a steady rise in the temperature as you continually use ft8. ?I also am very protective of equipment
so I never run more that 50% rated output power of the radio and never use an amp. ?
K9OQ ?
On Jan 28, 2025, at 7:10?PM, Stiv Ostenberg <stiv@...> wrote:
?
Yeah, what is the deal with that?? My FT710 says it supports a 50% duty cycle, but then appears to retract that claim when running FT8, which I thought was almost exactly a 50% duty cycle.
?
?
Thanks for the reply.? That is good to know.? I did see in the FT950 manual that it was advised to run it at 1/3 to 1/2 power if making long digital mode transmissions.???
My FT450AT handled it like that fine for 2 1/2 years, then it didn't.
---- On Tue, 28 Jan 2025 11:23:05 -0600
Lee Mannchen <email@...> wrote ---
I ran my FT-950 almost every day like that for 7 years. Never had a problem. sstv, ezpal, rrty, you name it, I ran it.
On 1/28/2025 12:16 PM, John Geiger AF5CC via groups.io wrote:
Has anyone seen a list, or have knowledge, of which Yaesu transceivers are rated for 100% power out for full duty cycle modes like RTTY and FM?
?
?
?
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Yaesu FT450 final transistor issues?
Here what was recently posted on an eham.net review for a different radio:
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".re: the FT-450 used at the same price...there is a reason...
long history of losing the finals."
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Has anyone else heard of this?? I did a quick google search and could find nothing about this supposed history.? If there are final transistor issues, is this just for the FT450AT or for the FT450D as well?? Any links supporting this claim would be interesting to see as well.
?
73 John AF5CC
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Re: Full Duty Cycle radios
The way I look at it is it is not about specs it is about heat. ?That is why I love the temperature meter on the Ftdx101mp. ?I think most of the recent radios from Yaesu have that as part of the meter. ? Just turn on the temperature meter and watch what happens with the temperature of the final. ?Keep that within specs and you will be fine. ?I do the same with my Flex 6400 although in that case I had to add on some software that puts a meter on the screen that shows the temperature of the finals. ?I don’t think ft8 is exactly 50% duty cycle in that the temperature during receive never goes quite back to normal after transmit. ?Additionally you will see a steady rise in the temperature as you continually use ft8. ?I also am very protective of equipment so I never run more that 50% rated output power of the radio and never use an amp. ?
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On Jan 28, 2025, at 7:10?PM, Stiv Ostenberg <stiv@...> wrote:
?
Yeah, what is the deal with that?? My FT710 says it supports a 50% duty cycle, but then appears to retract that claim when running FT8, which I thought was almost exactly a 50% duty cycle.
?
?
Thanks for the reply.? That is good to know.? I did see in the FT950 manual that it was advised to run it at 1/3 to 1/2 power if making long digital mode transmissions.???
My FT450AT handled it like that fine for 2 1/2 years, then it didn't.
---- On Tue, 28 Jan 2025 11:23:05 -0600
Lee Mannchen <email@...> wrote ---
I ran my FT-950 almost every day like that for 7 years. Never had a problem. sstv, ezpal, rrty, you name it, I ran it.
On 1/28/2025 12:16 PM, John Geiger AF5CC via groups.io wrote:
Has anyone seen a list, or have knowledge, of which Yaesu transceivers are rated for 100% power out for full duty cycle modes like RTTY and FM?
?
?
?
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Re: Full Duty Cycle radios
Yeah, what is the deal with that?? My FT710 says it supports a 50% duty cycle, but then appears to retract that claim when running FT8, which I thought was almost exactly a 50% duty cycle.
?
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Show quoted text
From: [email protected] <[email protected]>
On Behalf Of John Geiger AF5CC via groups.io
Sent: Tuesday, January 28, 2025 9:30 AM
To: Yaesu-Amateur-Radio <[email protected]>
Subject: Re: [Yaesu-Amateur-Radio] Full Duty Cycle radios
?
Thanks for the reply.? That is good to know.? I did see in the FT950 manual that it was advised to run it at 1/3 to 1/2 power if making long digital mode transmissions.???
My FT450AT handled it like that fine for 2 1/2 years, then it didn't.
---- On Tue, 28 Jan 2025 11:23:05 -0600
Lee Mannchen <email@...> wrote ---
I ran my FT-950 almost every day like that for 7 years. Never had a problem. sstv, ezpal, rrty, you name it, I ran it.
On 1/28/2025 12:16 PM, John Geiger AF5CC via groups.io wrote:
Has anyone seen a list, or have knowledge, of which Yaesu transceivers are rated for 100% power out for full duty cycle modes like RTTY and FM?
?
?
?
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Re: Full Duty Cycle radios
I was driving an AL-1200 so I could not overdrive the amp and got
a good clean signal out. All yaesu radios must be carefully
adjusted so they don't splatter. Very easy to do with a Yaesu. The
newer rigs have the AMC which chokes them down and keeps them from
over modulating.
On 1/28/2025 12:29 PM, John Geiger
AF5CC via groups.io wrote:
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Show quoted text
Thanks for the reply.? That is good to know.? I did see in
the FT950 manual that it was advised to run it at 1/3 to 1/2
power if making long digital mode transmissions.??? My FT450AT
handled it like that fine for 2 1/2 years, then it didn't.
73 John AF5CC
|
Re: Full Duty Cycle radios
Thanks for the reply.? That is good to know.? I did see in the FT950 manual that it was advised to run it at 1/3 to 1/2 power if making long digital mode transmissions.??? My FT450AT handled it like that fine for 2 1/2 years, then it didn't.
73 John AF5CC
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I ran my FT-950 almost every day like that for 7 years. Never had
a problem. sstv, ezpal, rrty, you name it, I ran it.
On 1/28/2025 12:16 PM, John Geiger
AF5CC via groups.io wrote:
Has anyone seen a list, or have knowledge, of which Yaesu
transceivers are rated for 100% power out for full duty cycle
modes like RTTY and FM?
?
73 John AF5CC
|
Re: Full Duty Cycle radios
I ran my FT-950 almost every day like that for 7 years. Never had
a problem. sstv, ezpal, rrty, you name it, I ran it.
On 1/28/2025 12:16 PM, John Geiger
AF5CC via groups.io wrote:
toggle quoted message
Show quoted text
Has anyone seen a list, or have knowledge, of which Yaesu
transceivers are rated for 100% power out for full duty cycle
modes like RTTY and FM?
?
73 John AF5CC
|
Has anyone seen a list, or have knowledge, of which Yaesu transceivers are rated for 100% power out for full duty cycle modes like RTTY and FM?
?
73 John AF5CC
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Another thing to look at is your antenna. If too much RF is being reflected back to the transmitter it might shut down to reduce the?chance of damaging the radio. I would use a good quality antenna analyzer to eliminate the antenna as the culprit. My next move would be to contact Yaesu at? customerservice@...?or call them at:
Contact us?(714)827-7600 between 8AM – 5PM PSTSDR HF Technical Support option 8 (NEW)Parts?Department option?4Customer?Service option?5Technical?Support option?6
Good luck, Dave KD2AYQ
On Wed, Jan 22, 2025 at 5:16?PM Donald Hellen via <donhellen= [email protected]> wrote: On Wed, Jan 22, 2025 at 11:20 AM, John Geiger AF5CC wrote:
What antenna are you using and how close is it to the radio? RF getting into the radio can also shut it down.
This is my suspicion. Do you have ferrites on all the cables (power, USB, etc.)?
?
Digital modes are more likely to shut down your setup due to RF getting into the computer, radio, or even the power supply, because it's transmitting at full power (whatever you have the radio set for). You might get away with SSB when you can't with FT-8.
?
Donald KX8K
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On Wed, Jan 22, 2025 at 11:20 AM, John Geiger AF5CC wrote:
What antenna are you using and how close is it to the radio? RF getting into the radio can also shut it down.
This is my suspicion. Do you have ferrites on all the cables (power, USB, etc.)?
?
Digital modes are more likely to shut down your setup due to RF getting into the computer, radio, or even the power supply, because it's transmitting at full power (whatever you have the radio set for). You might get away with SSB when you can't with FT-8.
?
Donald KX8K
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What power supply are you using with the radio?? It might be going bad and not providing enough current or voltage.? Could also be the fuses in the power cord.? I have had fuses that check out ok with a continuity meter but still didn't allow enough current to get through.? If you have another power supply or cord you can use to try and see if it is one of those, or hook up another radio to your power supply and cord and see if it does the same thing.
What antenna are you using and how close is it to the radio? RF getting into the radio can also shut it down.
73 John AF5CC
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Howdy Amigos;
? I bought an FT-710 about a year ago when I got my General license.? It has worked great so far, and I am using it in my work to promote Amateur Radio in the SF Bay Area.? Recently it has started causing me problems, and I cant figure it out.
What happens is that I can hook it up just fine,? and run WSJT to access FT8.? It sees all the other stations, but when I go to transmit, the radio shuts itself off.? *click".? ?I have tried both using HRD for Cat Control, and having WSJT handle CAT itself, same problem.? Sometimes I can transmit enough to make a contact, others I have to keep turning the radio back on and trying to complete an exchange.
I backed out of FT8, and tried transmitting with the mike.? As soon as I speak, KAPOW.? Its a deader.??
I tried backing the power back to 50w, and it seems happier, but 75 croaked it again. ?
Any ideas what the problem is?? I was demoing the radio in front of a large group of new hams when it decided to start this, and it looked pretty bad.
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Sounds like a power supply problem. A transmitter will shut down,
if you overload its power source.
Gary
On 1/21/2025 6:25 PM, Stiv Ostenberg
wrote:
toggle quoted message
Show quoted text
Howdy Amigos;
? I bought an FT-710 about a year ago when I got my General
license.? It has worked great so far, and I am using it in my
work to promote Amateur Radio in the SF Bay Area.? Recently it
has started causing me problems, and I cant figure it out.
What happens is that I can hook it up just fine,? and run WSJT
to access FT8.? It sees all the other stations, but when I go to
transmit, the radio shuts itself off.? *click".? ?I have tried
both using HRD for Cat Control, and having WSJT handle CAT
itself, same problem.? Sometimes I can transmit enough to make a
contact, others I have to keep turning the radio back on and
trying to complete an exchange.
I backed out of FT8, and tried transmitting with the mike.? As
soon as I speak, KAPOW.? Its a deader.??
I tried backing the power back to 50w, and it seems happier, but
75 croaked it again.
?
Any ideas what the problem is?? I was demoing the radio in
front of a large group of new hams when it decided to start
this, and it looked pretty bad.
|
Howdy Amigos;
? I bought an FT-710 about a year ago when I got my General license.? It has worked great so far, and I am using it in my work to promote Amateur Radio in the SF Bay Area.? Recently it has started causing me problems, and I cant figure it out.
What happens is that I can hook it up just fine,? and run WSJT to access FT8.? It sees all the other stations, but when I go to transmit, the radio shuts itself off.? *click".? ?I have tried both using HRD for Cat Control, and having WSJT handle CAT itself, same problem.? Sometimes I can transmit enough to make a contact, others I have to keep turning the radio back on and trying to complete an exchange.
I backed out of FT8, and tried transmitting with the mike.? As soon as I speak, KAPOW.? Its a deader.??
I tried backing the power back to 50w, and it seems happier, but 75 croaked it again.
?
Any ideas what the problem is?? I was demoing the radio in front of a large group of new hams when it decided to start this, and it looked pretty bad.
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PS, Filters, manuals, and more FS
power supply, crystal filter, manuals
and more For Sale:
.
Yaesu Crystal Filters:
I have a variety of crystal filters available
that fit Yaesu rigs.
All of these filters work 100% like they should,
and look great also.
.
The following filters are for the 8.2 MHz IF.
They fit the FT-1000 series, plus many, many others.
If you have a fairly modern Yaesu rig, they probably
fit, but check you manual.
Yaesu XF-8.2M-251-01, 250 Hz CW
filter for the 8.215 MHz IF. $75
Yaesu XF-8.2M-202-01, 2000 Hz SSB
filter for the 8.215 MHz IF. $75
.
The following filters are for the 455 KHz IF.
They fit the FT-1000 series, plus many, many others.
If you have a fairly modern Yaesu rig, they probably
fit, but check you manual. As a general statement,
the filters for the 455 KHz IF are sharper, with
steeper skirts.
XF-455K-501-01
500 Hz wide for CW $115
.
Yaesu FP-707, 20 Amp Speaker/Power Supply:
The Yaesu FP-707 is a 20 amp 13.8 Volt DC
Power Supply, with a very nice front facing
speaker in the same enclosure.
Cosmetically, it matches the FT-707, FT-747,
FT-757 and likely others.
Electrically, it can provide up to 20 amps,
so will work with most any HF and/or VHF rig.
It also has a set of binding posts on the back
for easy connection of a rig in addition
to the HF rig.
The speaker has a 3.5 mm plug on it.
This particular unit is in very good shape
both electrically and cosmetically. I can
not find a scratch, dent, or ding on it.
Electrically, it works as it should.
Buy this unit with manual for $120.
.
Yaesu NC-9 B Charger
13 V DC at 45 ma, 2.5 mm plug; $12
.
Original Yaesu Manuals:
These are the manuals only. All are originals, and not copies.
Most are in close to new condition.
FNB-9,10,11,12 Battery packs, $2
FC-757AT Antenna Tuner, $10
FT-100 HF/VHF Transceiver, $18
FT-470 Dual Band HT, $10
FT-757 GX, HF Transceiver, $18
FT-720 R, 2 meter mobile, $8
FT-1802 M, 2 meter mobile, $12
FT-2700 Dual Band Xcvr, $12
FTH-2005 HT, $5
FTS-8 tone squelch unit, $3
FTS-12 tone squelch unit, $3
MH-1B A2B speaker microphone, $2
SP-101 P, Speaker / Phone patch, $5
VX-1 dual band HT, $10
Maintenance Service Manual for Yaesu FT-208 R
2 meter HT. Looks new. $25
Technical Supplement for Yaesu FT-2700
Dual Band Mobile. Looks new. $20
These are original Yaesu operating manuals only,
in very nice condition.
.
I also have many other accessories available such as many
different types of microphones, HTs, VHF and UHF rigs, HF
and VHF/UHF antennas, connectors, miscellaneous accessories,
etc.
Just too many to list here. Please e-mail your requests.
.
Prices do not include shipping from Florida.
Thanks.
73,
Ken, W8EK
Ken Simpson
E-mail to W8EK@... or W8EK@...
Voice Phone (352) 732-8400
.
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Yaesu FT450 items for sale
I have a few extra items that came with a Yaesu FT450D I recently purchased.? Love the rig, just don't need these extras:
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1. a set of side rails with handles for the FT450 series of radios. These are the rails that attach to the side of the radio using the mobile mounting bracket holes and provide handles in the front for carrying and protection.
I have no need for them as the radio is being used in my shack, not portable. They appear to have been 3D printed, but they could be commercially made. I am asking $16 shipped
2. The original box with inserts for a Yaesu FT450D which will also fit the FT450AT. Great shape, good way to store your FT450 or to send it in for updates or ship to a buyer. I will wrap it in heavy paper for shipping so it doesn't get any labels or marks on it.? I am asking $28 shipped.
3.I also have the original operators manual for the Yaesu FT450D. There are a few pencil notes in if that could be removed if wanted. These are only in a few places and don't look objectionable, and you might even find them useful.I am asking $11 shipped by media mail.
Feel free to make an offer on one or all also!? I can take paypal/check/MO/Cashapp.
73 John AF5CC
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FTM 7250 Connecting to Fusion
I have a 7250 and am having problem connecting to Fusion. I press P3 on mike fore WiresX and it does not connect to repeater,?
I have been on before, so I dO not know if I changed anything.
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Jim? ? W9JWN
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FS: Yaesu FT890 parts radio
I have for sale a Yaesu FT890 HF radio that is a parts or fix up unit.? Case is in decent condition with some scratches on it.? It has no optional filters installed, and comes with the radio only, no mic or power cord.? Here are the issues with it:
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1. Receives on FM mode ok, no receive on other modes-maybe a damaged ceramic SSB filter, as I am guessing that all modes but FM pass through it.? That is just a guess, though.? I could hear some FT8 stations when in FM mode so it is receiving there.
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2. Putting out around 1 to 2 watts max.? The meter shows full output, but an external meter only shows a couple of watts.? I could hear its carrier on another receiver.
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3. SWR meter shows a high SWR even though the antenna has a low SWR, might be related to #4
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4. It has the internal antenna tuner installed but it doesn't seem to work.? Couldn't find a match after a minute or so.
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The display is fine, all buttons seem to work fine, VFO dial spins freely.? It could have other issues I have not been able to find.? It is being sold as-is, not working correctly.? I am asking $175 shipped and can take paypal/check/MO.
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73 John AF5CC
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FS Yaesu original operating manuals
I am helping a local ham close out his station and have a decent sized set of HF and VHF radio manuals. These are all the original operating manuals, not copies. Asking $10 each shipped by media mail and I can take paypal/check/MO.
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Here are the manuals I have available:
Yaesu FT5100 2m/70cm radio
Yaesu FT8000 VHF/UHF radio
Yaesu FT100 HF/VHF/UHF radio
Yaesu FT2200 2 meter
Yaesu FT680 6 meter all mode radio
Yaesu FT780 70cm all mode radio
73 John AF5CC
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Carl Foster - KB7AZ
Stiv Ostenberg
Dave KD2AYQ