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Re: Yaesu TCXO-9 High Stability Crystal

 

Steve A typical Chinese TCXO must be removed from radio to access adjustment tap - a really useful feature (NOT), while the real McCoy can be adjusted in place.? Regards, Phil / K4PO

?
Re: Yaesu TCXO-9 High Stability Crystal

 

I bought all these from HRO, I'll try them instead

73 Steve
Re: Yaesu TCXO-9 High Stability Crystal

 

I'm sure Radioworld can help you.

John
VE7KKQ


On Sun, Feb 6, 2022 at 1:44 PM Steve Lenaghan <steve.lenaghan@...> wrote:
I have one of these:

Of late my FT-897 has been drifting off enough to be annoying on SSB and probably causing me issues with WSJT.
I'm not sure how to adjust it.? I have a high end Fluke counter if necessary but I'm old school, WWV USB/LSB till they sound the same

I had one of these in the parts box, when installed it was bang on with WWV?

:?

To be honest, I'm not sure which is the Chinese unit and which is factory

73 Steve VE5SR/CIW406

Yaesu TCXO-9 High Stability Crystal

 

I have one of these:

Of late my FT-897 has been drifting off enough to be annoying on SSB and probably causing me issues with WSJT.
I'm not sure how to adjust it.? I have a high end Fluke counter if necessary but I'm old school, WWV USB/LSB till they sound the same

I had one of these in the parts box, when installed it was bang on with WWV?

:http://www.sonic.net/~n6gn/Yaesu/Yaesu_FT8x7.html?

To be honest, I'm not sure which is the Chinese unit and which is factory

73 Steve VE5SR/CIW406
Re: FT857D No TX Power on all bands

 

Have you tried to clean the relays??
To perform the Relay Cleaning Procedure:
Power down the radio. Hold both the [BAND UP] button and [BAND DWN] button (Buttons #12) simultaneously while turning on the rig with the POWER button (Button #5). The relays will start clicking while cleaning. When the cleaning is done, the radio will be in it's normal state.
Re: FT857D No TX Power on all bands

 

Right, it's the same path I want to take.
?
The forum has reached its limit.


Il giorno ven 4 feb 2022 alle ore 17:21 J.D. Barron <jeter.d.barron@...> ha scritto:
If the full factory reset does not get you going I believe you will have to actuallyt open the radio up and troubleshoot.?
The TX indication shows me that you are getting into the transmit mode and you will probably have to actually get a scope and trace the signal through the transmit chain.
I think you are in the zone where one measurement will tell you a great deal about what is going on.?
There are a few places where a single failure will take the transmitter down. I think that testing in FM will bypass part of the circuits and SSB the FM part.?
I assume the radio receives all modes and bands OK.
There are a couple of points where all modes of transmit pass through and it could be as simple as a bad switching diode or amp.
I believe that you have exhausted most of the external causes for lack of transmitting.

Re: FT857D No TX Power on all bands

 

is the first thing I did .....
thanks anyway.

Il giorno ven 4 feb 2022 alle ore 17:13 Tom Sneden <tsneden@...> ha scritto:
Do a master reset! Here's how:
To perform the master reset:
Hold the [HOME] button (Button #4) while turning on the rig with the POWER button (Button #10). The radio will be reset to factory default settings.

On Fri, Feb 4, 2022 at 1:25 AM Pasquale Stella <hb9irb@...> wrote:

Unfortunately, no carrier starts: When I press the PTT the red TX / BUSY light turns on and the fan starts, and I repeat it does not absorb any current from the power supply. Tested in all TX modes: SSB, CW, AM, FM, DIG etc.

73 Pasky HB9IRB

Il 02.02.22 19:36, Steve Rosman ha scritto:
Apologies in advance if this was already checked.? Does the radio show red light for transmit,? and what mode are you using? Only CW, PKT, or FM will transmit a carrier without modulating like speaking into the mike.? I have forgotten to check this more than once and saw no power output. Hope this helps.? 73 Steve KA2YRA?

On Wed, Feb 2, 2022, 1:25 PM Pasquale Stella <hb9irb@...> wrote:
it would be too beautiful and simple if you could solve it as you suggested ....... a bit of optimism comes from the fact that the radio has 2 HF + V-UHF power amps and it seems impossible to me that both are burned at the same time. it is much more likely that the pre drive driving both power amplifiers has burned out.

So I appeal to all owners of this radio who know of this rare problem.

HB9IRB

Re: FT857D No TX Power on all bands

 

If the full factory reset does not get you going I believe you will have to actuallyt open the radio up and troubleshoot.?
The TX indication shows me that you are getting into the transmit mode and you will probably have to actually get a scope and trace the signal through the transmit chain.
I think you are in the zone where one measurement will tell you a great deal about what is going on.?
There are a few places where a single failure will take the transmitter down. I think that testing in FM will bypass part of the circuits and SSB the FM part.?
I assume the radio receives all modes and bands OK.
There are a couple of points where all modes of transmit pass through and it could be as simple as a bad switching diode or amp.
I believe that you have exhausted most of the external causes for lack of transmitting.
Re: FT857D No TX Power on all bands

 

Do a master reset! Here's how:
To perform the master reset:
Hold the [HOME] button (Button #4) while turning on the rig with the POWER button (Button #10). The radio will be reset to factory default settings.


On Fri, Feb 4, 2022 at 1:25 AM Pasquale Stella <hb9irb@...> wrote:

Unfortunately, no carrier starts: When I press the PTT the red TX / BUSY light turns on and the fan starts, and I repeat it does not absorb any current from the power supply. Tested in all TX modes: SSB, CW, AM, FM, DIG etc.

73 Pasky HB9IRB

Il 02.02.22 19:36, Steve Rosman ha scritto:
Apologies in advance if this was already checked.? Does the radio show red light for transmit,? and what mode are you using? Only CW, PKT, or FM will transmit a carrier without modulating like speaking into the mike.? I have forgotten to check this more than once and saw no power output. Hope this helps.? 73 Steve KA2YRA?

On Wed, Feb 2, 2022, 1:25 PM Pasquale Stella <hb9irb@...> wrote:
it would be too beautiful and simple if you could solve it as you suggested ....... a bit of optimism comes from the fact that the radio has 2 HF + V-UHF power amps and it seems impossible to me that both are burned at the same time. it is much more likely that the pre drive driving both power amplifiers has burned out.

So I appeal to all owners of this radio who know of this rare problem.

HB9IRB

Re: FT857D No TX Power on all bands

 

This is a long shot, but I've had several issues of the the years with radios receiving but not putting out an RF power due to poor power cord connections.? In some cases at the power supply because the ring terminals were not soldered on and corrosion developed over time and in at least two cases because corrosion developed in the fuse holder.? This causes a voltage drop when trying to draw transmit current, since the corrosion "acts" like a resistor.? They were all easy fixes.? You might check those before spending time and money getting the radio worked on.? Simple things first.
Good luck
Cliff/W6OEM
Re: FT857D No TX Power on all bands

 

开云体育

this may also be an option, but the relay switching noise is heard. Both from the PTT on the microphone, and from the PTT on the device




Il 02.02.22 17:56, Sean S ha scritto:

I know practically nothing at all about xcvr internals but just wanted to throw out: T/R relay?

On Wed, Feb 2, 2022, 09:21 Hanford Wright <joh69@...> wrote:
Did you try the radio with another antenna or dummy load?? Also check your coax center conductor to the outer shell of your coax connector to see if you have a short.? Good luck..

Best Regards
Hanford R Wright
WA4LZC
CCA# AC11-12590
y please pardon my typos.

On Feb 2, 2022, at 10:06, Pasquale Stella <hb9irb@...> wrote:

?No TX Power on all bands

While tuning a V-UHF antenna the output power dropped to zero. Now by pressing the PTT,
on all bands the transceiver absorbs approx. 500 mmA from the power supply.

IF filters can't be because they were replaced 3 years ago and then they don't produce this symptom.

Please suggest me some solutions
HB9IRB

Re: FT857D No TX Power on all bands

 

开云体育


Il 02.02.22 17:56, Sean S ha scritto:

I know practically nothing at all about xcvr internals but just wanted to throw out: T/R relay?

On Wed, Feb 2, 2022, 09:21 Hanford Wright <joh69@...> wrote:
Did you try the radio with another antenna or dummy load?? Also check your coax center conductor to the outer shell of your coax connector to see if you have a short.? Good luck..

Best Regards
Hanford R Wright
WA4LZC
CCA# AC11-12590
y please pardon my typos.

On Feb 2, 2022, at 10:06, Pasquale Stella <hb9irb@...> wrote:

?No TX Power on all bands

While tuning a V-UHF antenna the output power dropped to zero. Now by pressing the PTT,
on all bands the transceiver absorbs approx. 500 mmA from the power supply.

IF filters can't be because they were replaced 3 years ago and then they don't produce this symptom.

Please suggest me some solutions
HB9IRB

Re: FT857D No TX Power on all bands

 

开云体育

correct colleague, I too am almost convinced of this.
the power amplifier will be in order but it is not receiving power.

Unfortunately, I am not a technician and I do not have the necessary equipment .......

Pasky HB9IRB

Il 02.02.22 22:12, Giuli Lauto via groups.io ha scritto:

If 500mA at tx is confirmed the tx chain has not power supply or tx bias.
Start digging from this fact.

Re: FT857D No TX Power on all bands

 

开云体育

Unfortunately, no carrier starts: When I press the PTT the red TX / BUSY light turns on and the fan starts, and I repeat it does not absorb any current from the power supply. Tested in all TX modes: SSB, CW, AM, FM, DIG etc.

73 Pasky HB9IRB

Il 02.02.22 19:36, Steve Rosman ha scritto:

Apologies in advance if this was already checked.? Does the radio show red light for transmit,? and what mode are you using? Only CW, PKT, or FM will transmit a carrier without modulating like speaking into the mike.? I have forgotten to check this more than once and saw no power output. Hope this helps.? 73 Steve KA2YRA?

On Wed, Feb 2, 2022, 1:25 PM Pasquale Stella <hb9irb@...> wrote:
it would be too beautiful and simple if you could solve it as you suggested ....... a bit of optimism comes from the fact that the radio has 2 HF + V-UHF power amps and it seems impossible to me that both are burned at the same time. it is much more likely that the pre drive driving both power amplifiers has burned out.

So I appeal to all owners of this radio who know of this rare problem.

HB9IRB

Re: FT857D No TX Power on all bands

 

开云体育

Is it possible it was bumped into SSB mode and won't transmit until you talk?
Randy (KE5EOT)
  ARRL, QCWA, ARES, RACES, ROWH
On 2/2/22 8:58 AM, Pasquale Stella wrote:

No TX Power on all bands

While tuning a V-UHF antenna the output power dropped to zero. Now by pressing the PTT,
on all bands the transceiver absorbs approx. 500 mmA from the power supply.

IF filters can't be because they were replaced 3 years ago and then they don't produce this symptom.

Please suggest me some solutions
HB9IRB

Re: FT857D No TX Power on all bands

 

If 500mA at tx is confirmed the tx chain has not power supply or tx bias.
Start digging from this fact.
Re: FT857D No TX Power on all bands

 

A very good question above was if the transmit indication was being activated. If the transmit indicator is not showing transmit mode then the problem could be in the PPT circuits either mike or internal switching.? A very pertinent observation there.
Re: FT857D No TX Power on all bands

 

Is there anything plugged into the CAT or DATA ports on the rear? If so remove them and re test. I have seen where a Tiny Trak 4 was connected to my FT 857D and it stopped the PTT on the mic from putting the radio into Tx mode.
--
Compton
VK2HRX
Sydney, Australia
Re: FT857D No TX Power on all bands

 

Apologies in advance if this was already checked.? Does the radio show red light for transmit,? and what mode are you using? Only CW, PKT, or FM will transmit a carrier without modulating like speaking into the mike.? I have forgotten to check this more than once and saw no power output. Hope this helps.? 73 Steve KA2YRA?


On Wed, Feb 2, 2022, 1:25 PM Pasquale Stella <hb9irb@...> wrote:
it would be too beautiful and simple if you could solve it as you suggested ....... a bit of optimism comes from the fact that the radio has 2 HF + V-UHF power amps and it seems impossible to me that both are burned at the same time. it is much more likely that the pre drive driving both power amplifiers has burned out.

So I appeal to all owners of this radio who know of this rare problem.

HB9IRB

Re: FT857D No TX Power on all bands

 

No TX on all bands and the receiver works OK on all bands means that there will have to be some troubleshooting involved.
First try a factor reset to see if something has been miss-set.
After this you need to get into the circuits and trace the signal.
It could a couple of spots in the transmitter chain as often FM might go a different path than CW, AM or SSB.
It gets beyond troubleshooting over the internet fairly quickly and if you don't have the basic equipment and skills you might do more damage than good.
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