[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
___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist


Re: [Drakelist] DRAKE R7A problem on change frequency band.

2018-08-23 Thread jetercreek

It could also be as simple as the molex pins on the digital readout board.
Pry the board out a bit and re-seat them.  Look the pins over for any cracks
in the solder.

Good luck!

Darrel, N0DBX

On 08/23/2018 11:49 AM, DW Harms (Dick) wrote:

Ciao Demis, your PLL needs adjustment I think 
You know how to do that?

73, Dick PA2DW


Op 23 aug. 2018 om 18:29 heeft Demis Bertoni  het volgende 
geschreven:

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
___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist

___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist



___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist


Re: [Drakelist] DRAKE R7A problem on change frequency band.

2018-08-23 Thread Lee Craner
Dennis:

Have you tried reseating all of the boards.  The R7's and TR7's suffer from 
oxidation on the board connectors.  Simply removing and replacing each board 
typically fixes problems like you are experiencing.  Do the same to each of the 
cable connectors to each board as well as the power supply board hiding behind 
the antenna switch on the right side of the front panel.

73 es GL
Lee WB6SSW

 

 

 

-Original Message-
From: Demis Bertoni 
To: drakelist 
Sent: Thu, Aug 23, 2018 9:30 am
Subject: [Drakelist] DRAKE R7A problem on change frequency band.



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


___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist

___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist


Re: [Drakelist] DRAKE R7A problem on change frequency band.

2018-08-23 Thread DW Harms (Dick)
Ciao Demis, your PLL needs adjustment I think 
You know how to do that?

73, Dick PA2DW

> Op 23 aug. 2018 om 18:29 heeft Demis Bertoni  het volgende 
> geschreven:
> 
> 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
> ___
> Drakelist mailing list
> Drakelist@zerobeat.net
> http://mailman.zerobeat.net/mailman/listinfo/drakelist

___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist


[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
___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist