VHF Spectra won't take freq....

[OCSD117]

Hi all I jhave a Dash mount VHf spectra. i am attempting to add the V-Call and V-TAC channels and it will let me put in all but one.

It takes (on TX and RX):

155.7525
151.1375
158.7375
159.4725

But won't take:

154.4525 on RX but it will on TX

any help would be appreciated!

mike

[Jim202]

The Spectra VCO and syn were never designed for the splinter channels. This is why
you can't get that one channel to program. Only solution is to go to a different radio
model. The Astor Spectra will do these frequencies.

Jim

Hi all I jhave a Dash mount VHf spectra. i am attempting to add the V-Call and V-TAC channels and it will let me put in all but one.

It takes (on TX and RX):

155.7525
151.1375
158.7375
159.4725

But won't take:

154.4525 on RX but it will on TX

any help would be appreciated!

mike

[txshooter]

A 2.5K capable Astro Spectra VHF will do that frequency. The wideband will not.......

[OCSD117]

how is it then that it will take the other ones no problem?

[Hartley]

Hi RPDM,

Because all of those are on 12.5 kHz steps, while the one that fails is on a 2.5 kHz step.

73 DE Hartley

[ai4ui]

Your radio is from a time when radio channels where based on 15 kHz spacing. With refarming the FCC has taken the 15 kHz spacing and made it into 7.5 kHz spacing. Sometimes the older radios will accept the new channels, sometimes they won't. There will be about 1/3 of the new channels your radio will not work on. Technically it won't work on any of them because you will be overdeviated. The new channels are narrowbanded & your radio is not. In fact, all the new NTIA interop channels are narrowbanded. They are even taking the long established mutual aid channels & narrowbanding them as well. So if you want to be able to access all those new channels, you'll need a radio with a synthesizer that works in 2.5 kHz steps & 12.5 kHz channel width. Cha-Ching!

Robert