[ICOM] faulty bandfilter switch IC-720

[jpk5lad at cox.net]

Hi Hans --
I don't have the problem with my 720A but I understand that 
when the rotary switch keeps going and going (like the 
Energizer bunny) that you can burnish the contacts and 
clear that up.
There is also a modification on my web site to replace the 
rotary switch (when it finally bites the dust) with multiple 
relays.  See:

http://www.hayseed.net/~jpk5lad/IC-720/IC-
720%20Rotary%20Switch.htm

or

http://tinyurl.com/7e9ky

Good luck on your project and 73,
Jim - K5LAD


On 12 Jan 2006 at 20:27, Hans Hopstaken wrote:

> Hello Icom fans,
> 
> Having not used the rig for many years, the following problem shows
> up:
> 
> After switching on the IC-720 it turns out that the "rotary relay RL
> 2" keeps on switching. There is one exception: when using the up/down
> button on the front and switching it to 3,6 Mc/s the rig is working
> properly. The RL 2 goes to the base of Q1 and to Logic, eg. the J8
> connector.
> 
> Any ideas how to solve? Whatsay Adam, VA7OJ/AB4OJ .......
> 
> Many thanks in advance.
> 
> Rgds,
> Hans, pa0hop
> 
> 
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> 


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