[1000mp] May be off topic...
Bill Axelrod
bill at axelrods.org
Mon Dec 17 13:14:13 EST 2007
Gilles,
Thank you for the thoughtful advice. It gives me a good foundation for
troubleshooting.
73... Bill K3WA
----- Original Message -----
From: "f6ira" <f6ira at tele2.fr>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Monday, December 17, 2007 12:14 PM
Subject: Re: [1000mp] May be off topic...
> I'm not an professional repair technican but with just some logic you must
> solve your mistake:
> Even in bypass or operate the SWR is alway high
> Each probe looking same thing. TRX and Amp.
> Sure the problem coming after output power. Something between input to
> output is broken.
> When follow this logic for me the problem coming from output relay
> For confirm or not what i think you can verify with multimeter controler
> if when amp is in standby RX (take care ! amp off and unpluged from wall
> power socket ) are you continuity between input to output cental pins from
> PL connectors ?
> If probe is something different to 0 you are output relay wrong there.
> Burning components is perhaps around relay control board.
> Another test: place power meter between amp output to dummy load. Apply
> around 20 watts. If power in external probe were less than from TRX CV or
> none you sure that power still inside quadra.
> Gilles F6IRA
>
>
> Bill Axelrod a écrit :
>> Adam,
>>
>> Thanks for the info. The Amp actually works with the tuner engaged
>> or disengaged. I get full power. The turner tunes when engaged. Just
>> that the VSWR reading is wrong and some component(s) are burning. Even
>> with the amp in standby something changes the VSWR.
>>
>> For example, with the amp in standby my dummy load reads a 3.4:1 VSWR
>> on both the amp's meter and on my transceiver. When I connect the dummy
>> load directly to the xcvr it shows a 1:1.
>>
>> Thanks again... Bill
>> ----- Original Message ----- From: "Adam Farson" <farson at shaw.ca>
>> To: "'All about Yaesu 1000mp'" <1000mp at mailman.qth.net>
>> Sent: Sunday, December 16, 2007 5:00 PM
>> Subject: RE: [1000mp] May be off topic...
>>
>>
>>> Hi Bill,
>>>
>>> There is no Quadra reflector as far as I am aware. I have a Quadra page
>>> on
>>> my website:
>>>
>>> http://www.ab4oj.com/quadra/main.html
>>>
>>> Apart from the VS service centre in Cypress CA, Bill Grassa N4ATS may be
>>> able to assist you. His e-mail address is listed in his QRZ entry. It
>>> sounds
>>> as if there may be some damage in the low-pass filter area. Doe the
>>> amplifier operate correctly with the autotuner disengaged?
>>>
>>> Cheers for now, 73,
>>> Adam VA7OJ/AB4OJ
>>>
>>>
>>> -----Original Message-----
>>> From: 1000mp-bounces at mailman.qth.net
>>> [mailto:1000mp-bounces at mailman.qth.net]
>>> On Behalf Of Bill Axelrod
>>> Sent: 16-Dec-07 13:47
>>> To: 'All about Yaesu 1000mp'
>>> Subject: [1000mp] May be off topic...
>>>
>>> If this is off topic - go ahead and flame me if it makes you happy.
>>>
>>> I DO have a FT-1000MP MK V. It works well (knock wood).
>>>
>>> I also have a Yaesu Quadra amp which does not work well. It reports a
>>> very
>>> wrong SWR (either high or low depending on band) and now had the sweet
>>> smell
>>> of frying components. It does put out full power.
>>>
>>> Anyone have an idea what/where I should look or perhaps anyone who
>>> repairs
>>> these amps? Or, if off topic, is there a Quadra refelctor?
>>>
>>> Thanks and 73... Bill K3WA
>>>
>>> No virus found in this outgoing message.
>>> Checked by AVG Free Edition.
>>> Version: 7.5.503 / Virus Database: 269.17.4/1187 - Release Date:
>>> 16/12/2007
>>> 11:36
>>>
>>>
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>>>
>>
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>> Date: Sun, 16 Dec 2007 15:51:45 -0800
>> From: Adam Farson <farson at shaw.ca>
>> Subject: RE: [1000mp] Quadra (Was: May be off topic...)
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>>
>> Hi Bill,
>>
>> One additional question: Do you see the same erroneous SWR readings with
>> the
>> tuner in and out of circuit? The fact that you are seeing a 3.4:1 SWR
>> reading at your exciter as well as
>> on the Quadra's SWR scale suggests that something in the signal path is
>> introducing reactance. If the high reading occurs with the tuner in-line,
>> this may indicate damage in the tuner area. If not, the damage may be in
>> the
>> output T/R relay (I suggest this because you see the same error with the
>> amp
>> in standby, which eliminates the LPF's.)
>>
>> It may be a good idea to take the case covers and internal shields off
>> the
>> PA cabinet, and look/sniff for burnt components. You can click the
>> interior
>> pictures on my Quadra page for larger images to use as a guide. VS should
>> still have the service manual in stock.
>>
>> http://www.ab4oj.com/quadra/main.html
>>
>> Hope this helps.
>>
>> Cheers for now, 73,
>> Adam VA7OJ/AB4OJ
>>
>>
>> -----Original Message-----
>> From: 1000mp-bounces at mailman.qth.net
>> [mailto:1000mp-bounces at mailman.qth.net]
>> On Behalf Of Bill Axelrod
>> Sent: 16-Dec-07 15:37
>> To: All about Yaesu 1000mp
>> Subject: Re: [1000mp] May be off topic...
>>
>> Adam,
>>
>> Thanks for the info. The Amp actually works with the tuner engaged
>> or
>> disengaged. I get full power. The turner tunes when engaged. Just that
>> the VSWR reading is wrong and some component(s) are burning. Even with
>> the
>> amp in standby something changes the VSWR.
>>
>> For example, with the amp in standby my dummy load reads a 3.4:1 VSWR
>> on both the amp's meter and on my transceiver. When I connect the dummy
>> load directly to the xcvr it shows a 1:1.
>>
>> Thanks again... Bill
>> ----- Original Message -----
>> From: "Adam Farson" <farson at shaw.ca>
>> To: "'All about Yaesu 1000mp'" <1000mp at mailman.qth.net>
>> Sent: Sunday, December 16, 2007 5:00 PM
>> Subject: RE: [1000mp] May be off topic...
>>
>>
>>> Hi Bill,
>>>
>>> There is no Quadra reflector as far as I am aware. I have a Quadra page
>>> on
>>> my website:
>>>
>>> http://www.ab4oj.com/quadra/main.html
>>>
>>> Apart from the VS service centre in Cypress CA, Bill Grassa N4ATS may be
>>> able to assist you. His e-mail address is listed in his QRZ entry. It
>>> sounds
>>> as if there may be some damage in the low-pass filter area. Doe the
>>> amplifier operate correctly with the autotuner disengaged?
>>>
>>> Cheers for now, 73,
>>> Adam VA7OJ/AB4OJ
>>>
>>>
>>> -----Original Message-----
>>> From: 1000mp-bounces at mailman.qth.net
>>> [mailto:1000mp-bounces at mailman.qth.net]
>>> On Behalf Of Bill Axelrod
>>> Sent: 16-Dec-07 13:47
>>> To: 'All about Yaesu 1000mp'
>>> Subject: [1000mp] May be off topic...
>>>
>>> If this is off topic - go ahead and flame me if it makes you happy.
>>>
>>> I DO have a FT-1000MP MK V. It works well (knock wood).
>>>
>>> I also have a Yaesu Quadra amp which does not work well. It reports a
>>> very
>>> wrong SWR (either high or low depending on band) and now had the sweet
>>> smell
>>> of frying components. It does put out full power.
>>>
>>> Anyone have an idea what/where I should look or perhaps anyone who
>>> repairs
>>> these amps? Or, if off topic, is there a Quadra refelctor?
>>>
>>> Thanks and 73... Bill K3WA
>>>
>>
>> No virus found in this outgoing message.
>> Checked by AVG Free Edition. Version: 7.5.503 / Virus Database:
>> 269.17.4/1187 - Release Date: 16/12/2007
>> 11:36
>>
>>
>> ______________________________________________________________
>> 1000mp mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/1000mp
>> Help: http://mailman.qth.net/mmfaq.html
>> Post: mailto:1000mp at mailman.qth.net
>>
>>
>> ---
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>
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