UHF Conventional Spectra Programming question

[KD7FLY]

On Ebay recently there was a UHF Conventional Spectra for sale for a ridiculously cheap price. I'm not sure if there are anymore, but it was 403-440, and it's model number was D44KXA7JA4AK.
In regards to bumping it up to 450-460: Do you simply use the DOS Software that allows a bit of leeway when programming the frequencies? Or is there more to it with the UHF version?

I've gotten both of those answers↑ from local /\/\ fans-so I'm hoping someone in the community can give me the final answer...haha.

Thank you!

[SYNTORX71MAN]

Thats a big negative ghostrider, the pattern is full..LOL
No the govie band spectras cannot be pushed that far outta thier bandwidth with RSS
You are far better of buying a dedicated 450-470 range model.
They are pretty much dirt cheap now anyways on ebay and everywhere.
Actually conventional astro spectras a pretty d@mn cheap too nowadays .

[wa6jbd]

Just to be clear on one thing... the range 1 (403-433) CAN be pushed up to at least 450. So, they're great to use for ham band use. There's no point in trying to go higher, since the 450-470 radios are in great abundance.

[linkinpark9812]

Just to be clear on one thing... the range 1 (403-433) CAN be pushed up to at least 450. So, they're great to use for ham band use. There's no point in trying to go higher, since the 450-470 radios are in great abundance.

Huh, will the unmodified RSS allow this value on a 403-433? I know on my 146-174, I can go down to 142 but thats it. That would be weird if it let you enter that value without modification. Does the VCO actually lock and you get good RX/TX? Just seems to be pushing it too far. if it does though, that is great!

[wa6jbd]

Huh, will the unmodified RSS allow this value on a 403-433? I know on my 146-174, I can go down to 142 but thats it.

No, I had to fiddle with the band limits in RSS to get the range 1 radios to allow 440-450 frequencies. I found it important to NOT bit bang the radio to the proper range - let it keep thinking it's a 403-433 radio. Modify the software.

That would be weird if it let you enter that value without modification. Does the VCO actually lock and you get good RX/TX? Just seems to be pushing it too far. if it does though, that is great!

It WOULD be weird... but there's nothing wierd about it. The VCO needs to be modified, and so does the RX filter. I've found that the transmitter can make do as is, although it wouldn't hurt to retune that. I just do an alignment on the pwr out and current limit, and end up with pretty constant power out across the band.

Here's how to do it:

http://mysite.verizon.net/res8teuc/Rang ... ver1.1.htm

Again, DO NOT bit bang the radio to range 2. IT WILL NOT WORK. All attempts to retune with the published process, and then bit banged for programming have failed to work properly. Instead, you will need to modify band limits in RSS.