[Drakelist] DRAKE R7A problem on change frequency band. (SOLVED !!!)

2018-08-23 Thread Demis Bertoni
The temptation to solve the problem of the R7A has been very strong! I
removed the cover and carefully removed the DR7 card, sprayed all the
contacts on the connectors and de-oxidized the band change selector. After
installing the DR7 card again the problem has been solved !!! Thanks to
those who have given me advice and a special thanks to this really
fantastic mailing list!

73, Demis IZ4ORS
-- 
IZ4ORS - Demis Bertoni
Via Rebecchi, 13 - 41015 Nonantola
(Modena) - Italy
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[Drakelist] DRAKE R7A problem on change frequency band.

2018-08-23 Thread Demis Bertoni
Hello!
I've a Drake R7A with a problem on changing frequency band.
What happens is shown below:

BAND SWITCH  DISPLAY
0-0.5 0-500 OK
0.5-1.0500-1000 OK
1.0-1.5  1000-1500 OK
1.5-2.0  99500-0 ?
2.5-3.0500-1000 ?
3.5-4.0  1500-2000 ?
5.0-5.5  5000-5500 OK
7.0-7.5  5000-5500 ?
14.0-14.5  11500-12000 ?
21.0-21.5  21000-21500 OK
28.5-29.0  26500-27000 ?

Please someone who can help me solve the problem?
Thank you and 73!
Demis IZ4ORS



IZ4ORS - Demis Bertoni
Via Rebecchi, 13 - 41015 Nonantola
(Modena) - Italy
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Re: [Drakelist] Drakelist Digest, Vol 67, Issue 1

2017-10-10 Thread Demis Bertoni
Hello Dick,
thaks for your very quickly reply, I will do wath you told me next weekend!

73, Demis IZ4ORS


2017-10-10 18:00 GMT+02:00 <drakelist-requ...@zerobeat.net>:

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>1. DRAKE R7A jump the frequency (Demis Bertoni)
>2. Re: DRAKE R7A jump the frequency (DW Harms (Dick))
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> ------
>
> Message: 1
> Date: Tue, 10 Oct 2017 10:55:01 +0200
> From: Demis Bertoni <iz4...@gmail.com>
> To: drakelist@zerobeat.net
> Subject: [Drakelist] DRAKE R7A jump the frequency
> Message-ID:
> <CAKrxS_tTF-dZQpnGtrQdRfazmpH_7z8qkCPppYAQa0f5Rw++zA@mail.
> gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hi All,
> I've problem with my R7A, this morning during a QSO at 14,222, the
> reception frequency jumped directly to 12,222 for a few seconds to return
> to 14,222. I tried to rotate the band switch, the up and down buttons, but
> occasionally the frequency jumps. Where's the problem?
>
> Do you have a solution to this problem?
>
> Many thanks for possible help.
>
> My best 73's
> --
> IZ4ORS - Demis Bertoni
> Via Rebecchi, 13 - 41015 Nonantola
> (Modena) - Italy
> -- next part --
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> --
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> Message: 2
> Date: Tue, 10 Oct 2017 13:42:15 +0200
> From: "DW Harms (Dick)" <q...@kpnmail.nl>
> To: Demis Bertoni <iz4...@gmail.com>
> Cc: drakelist@zerobeat.net
> Subject: Re: [Drakelist] DRAKE R7A jump the frequency
> Message-ID: <d87c51e0-d7b7-4050-bf69-18b4382b2...@kpnmail.nl>
> Content-Type: text/plain; charset="us-ascii"
>
> Hello Demis,
>
> Guess the PLL needs adjustment, check the procedure in the service manual.
> I had something similar in my TR7 which was solved that way.
>
> 73, Dick PA2DW
>
>
>
> Verstuurd vanaf mijn iPhone
>
> > Op 10 okt. 2017 om 10:55 heeft Demis Bertoni <iz4...@gmail.com> het
> volgende geschreven:
> >
> > Hi All,
> > I've problem with my R7A, this morning during a QSO at 14,222, the
> reception frequency jumped directly to 12,222 for a few seconds to return
> to 14,222. I tried to rotate the band switch, the up and down buttons, but
> occasionally the frequency jumps. Where's the problem?
> >
> > Do you have a solution to this problem?
> >
> > Many thanks for possible help.
> >
> > My best 73's
> > --
> > IZ4ORS - Demis Bertoni
> > Via Rebecchi, 13 - 41015 Nonantola
> > (Modena) - Italy
> > ___
> > Drakelist mailing list
> > Drakelist@zerobeat.net
> > http://mailman.zerobeat.net/mailman/listinfo/drakelist
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> End of Drakelist Digest, Vol 67, Issue 1
> 
>



-- 
IZ4ORS - Demis Bertoni
Via Rebecchi, 13 - 41015 Nonantola
(Modena) - Italy
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[Drakelist] DRAKE R7A jump the frequency

2017-10-10 Thread Demis Bertoni
Hi All,
I've problem with my R7A, this morning during a QSO at 14,222, the
reception frequency jumped directly to 12,222 for a few seconds to return
to 14,222. I tried to rotate the band switch, the up and down buttons, but
occasionally the frequency jumps. Where's the problem?

Do you have a solution to this problem?

Many thanks for possible help.

My best 73's
-- 
IZ4ORS - Demis Bertoni
Via Rebecchi, 13 - 41015 Nonantola
(Modena) - Italy
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[Drakelist] REPLAY to VK3ZA on Drakelist Digest, Vol. 62, Issue 3

2017-01-26 Thread Demis Bertoni
Hi John and all readers,

follow the link for to download the TR7 SERVICE MANUAL very clear:

www.radiomanual.info/schemi/Surplus_Radioamateur/Drake_TR-7_serv.pdf

Greetings to all!

73 de IZ4ORS Demis

-- 
IZ4ORS - Demis Bertoni
Via Rebecchi, 13 - 41015 Nonantola
(Modena) - Italy
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[Drakelist] TR7A no AM modulation

2011-01-08 Thread Demis Bertoni
Hi All,
I have buyed on ebay a TR7A in good condition, but not functioning the AM
modulation. LSB and USB no problem. I have replaced the transmit exciter
board without result...
Do you have a solution to this problem?

Many thanks for possible help.

My best 73's

-- 
IZ4ORS - Demis Bertoni
Via Rebecchi, 13 - 41015 Nonantola
(Modena) - Italy
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[Drakelist] TR7A band change problem.

2010-11-28 Thread Demis Bertoni
Problem solved!
The problem was the chip U9002 on DR7 board.
Many thanks to Ernie W8EH, Ron WD8SBB and Garey K4OAH.
My best 73's to all.

IZ4ORS - Demis


-- 
IZ4ORS - Demis Bertoni
Via Rebecchi, 13 - 41015 Nonantola
(Modena) - Italy
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