[Premium-Rx] Cubic R-3030: Problems and WTD original manual

[Phil LaMarche]

Cubic 3030, 3030A and 2411 Overlays.

 

Brand new. I had these manufactured by the original Cubic Vendor. 

 

$30.00 a pair shipped. Please specify your receiver type when emailing.

 

Phil


Philip LaMarche

 
727-944-3226
727-510-5038 Cell 
 www.w9dvm.com
WWW.FLAMGROUP.COM

K3 # 1605
KPA500 # 029
P3 #1480

 CCA 98-00827
CRA 1701
W9DVM
 


-----Original Message-----
From: premium-rx-bounces at mailman.qth.net
[mailto:premium-rx-bounces at mailman.qth.net] On Behalf Of GandalfG8 at aol.com
Sent: Wednesday, July 11, 2012 7:10 PM
To: premium-rx at mailman.qth.net
Subject: Re: [Premium-Rx] Cubic R-3030: Problems and WTD original manual

In a message dated 11/07/2012 02:20:22 GMT Daylight Time,
hbreuer at debitel.net writes:

The  Cubic R-3030 is actually two identical receivers in a single cabinet.
Overall the cosmetic condition is good but the foil keyboards are  annoying.
There is either no contact or the key bounces. Anybody has a  solution for
it?
 
Hi Heinz
 
There are two issues with the keypads, firstly that the value of the
keybounce suppression cap in the interface module is too low, and secondly
that the keypad plastic overlays become detached from the keypads and bulge
in the middle because they are held in place by machine cut double sided
tape that  has a relatively small contact area on the thin frames separating
the individual  keys.
 
Issue one is dealt with by increasing the value of C2 in the Panel Interface
Module from 3.3uF to somewhere closer to 10uF.
This cap goes from pin 7 of U6, the 74C923 Keyboard Encoder to ground, and I
found it easier to leave the existing capacitor in place and fit another in
parallel across the top of the IC and soldered to the actual IC pins. I used
6.8uF but 4.7 uF would probably be ok too, or perhaps it was the other way
round it was a few years ago now:-)
 
In the case of the keypad overlays, I found it was possible, if very
careful, to remove them without damage and to cut some replacement double
sided tape and reinstall them.
However, this sounds a lot more straightforward than it is in  practice, it
is NOT a fun job but may be your only option.
A few years ago Cliff, W4NJ and also on this list, had some  replacement
overlays made to the original spec and if he still has any available  this
is by far the best option for replacement, but I'd try the capacitor mod
first just in case that's all you need.
 
Finding original extenders would indeed be a long shot but it may not be too
difficult to make your own.
The R3030 uses either standard DB25 connectors or DB25 coax shells with
varying numbers of inserts.
The DB25 wired connectors are easy enough to extend and the inserts do not
need to be mounted in a shell for test purposes.
Both male and female inserts are available and you should never need more
than five coax extenders for a single module.
 
Regards
 
Nigel
GM8PZR
 
 
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