[1000mp] May be off topic...
f6ira
f6ira at tele2.fr
Mon Dec 17 12:14:38 EST 2007
I'm not an professional repair technican but with just some logic you=20
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=20
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=20
from PL connectors ?
If probe is something different to 0 you are output relay wrong there.=20
Burning components is perhaps around relay control board.
Another test: place power meter between amp output to dummy load. Apply=20
around 20 watts. If power in external probe were less than from TRX CV=20
or none you sure that power still inside quadra.
Gilles F6IRA
Bill Axelrod a =E9crit :
> Adam,
>
> Thanks for the info. The Amp actually works with the tuner=20
> engaged or disengaged. I get full power. The turner tunes when=20
> engaged. Just that the VSWR reading is wrong and some component(s)=20
> 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=20
> VSWR on both the amp's meter and on my transceiver. When I connect=20
> 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=20
>> 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=20
>> [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=20
>> a very
>> wrong SWR (either high or low depending on band) and now had the=20
>> sweet smell
>> of frying components. It does put out full power.
>>
>> Anyone have an idea what/where I should look or perhaps anyone who=20
>> 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:=20
>> 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...)
> In-reply-to: <008c01c8403c$8539c3f0$0201000a at WTI1>
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>
> Hi Bill,
>
> One additional question: Do you see the same erroneous SWR readings=20
> with the
> tuner in and out of circuit?=20
> The fact that you are seeing a 3.4:1 SWR reading at your exciter as=20
> 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-lin=
e,
> this may indicate damage in the tuner area. If not, the damage may be=20
> in the
> output T/R relay (I suggest this because you see the same error with=20
> 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=20
> interior
> pictures on my Quadra page for larger images to use as a guide. VS shou=
ld
> 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=20
> [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=20
> engaged or
> disengaged. I get full power. The turner tunes when engaged. Just th=
at
> the VSWR reading is wrong and some component(s) are burning. Even=20
> with the
> amp in standby something changes the VSWR.
>
> For example, with the amp in standby my dummy load reads a 3.4:1 VS=
WR
> on both the amp's meter and on my transceiver. When I connect the dumm=
y
> 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=20
>> 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=20
>> [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=20
>> a very
>> wrong SWR (either high or low depending on band) and now had the=20
>> sweet smell
>> of frying components. It does put out full power.
>>
>> Anyone have an idea what/where I should look or perhaps anyone who=20
>> 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:=20
> 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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