Hacking of Spectra from 433 to 435

VR2WTF · Post by **VR2WTF** » Sun Apr 22, 2007 9:05 am

Sorry I know this is old tropic.
I only want to hacking the Spectra from 433MHz to 435MHz only.
I read the web but is it any instructions of hacking of VCO with photos?
Thanks!
73 de
VR2WTF

bellersley · Post by **bellersley** » Sun Apr 22, 2007 10:16 am

I don't think you'll need to do any VCO hacking. I have a 403-433 Spectra that plays quite happily up to about 440 without any modifications aside from software.

Will · Post by **Will** » Sun Apr 22, 2007 7:15 pm

I would tend to agree with bellersley. If you get the dreaded FAIL001 then you may have to do a cut on the stripline on the VCO. (make sure it is not the leaking capacitor problem first)
You may also change the - bias voltage on the VCO to get up to the high side.

VR2WTF · Post by **VR2WTF** » Sun Apr 22, 2007 8:20 pm

bellersley wrote:I don't think you'll need to do any VCO hacking. I have a 403-433 Spectra that plays quite happily up to about 440 without any modifications aside from software.

How you do that? Just modifiy the RSS?
I modified it and it gives FAIL001 when the channels have out-of-band.

mr.syntrx · Post by **mr.syntrx** » Mon Apr 23, 2007 12:05 am

Some radios will do it right away, some won't without hardware modifications.

VR2WTF · Post by **VR2WTF** » Mon Apr 23, 2007 12:07 am

mr.syntrx wrote:Some radios will do it right away, some won't without hardware modifications.

So what should I do?