Way to block TX on non-ham freqs 5RM/K5+

[UncleYoda]

I was reprogramming channels on my K5+ using Chirp and could not find a way to block transmit in VFO.  Chirp does not allow setting frequency range limits on these radios like it does for others like UV5R.  I know about setting Duplex to off for memorized channels but that leaves VFO open.  Is there something I'm missing or do I have to just hope Chirp will add the frequency range settings eventually?

[OffRoaderX]

5 minutes ago, UncleYoda said:

do I have to just hope Chirp will add the frequency range settings eventually?

Yes.

[GrouserPad]

How about duplex? Will it let you set duplex to off ?

 

 

my bad I just seen you were talking about in VFO mode. So disregard my post !

[Socalgmrs]

Why do you need to?  I’ve never accidentally transmitted out of band on any radio ever. Why is this even a thing?   And I do give my radios to noobs, kids, older people ect.   No one ever accidentally changed to fbo mode and then transmitted out of band.   

[UncleYoda]

27 minutes ago, Socalgmrs said:

Why do you need to?

I don't, but a few years ago there was some official at FCC that claimed using a radio that could transmit out of the allowed frequency bands just by using VFO was a violation.  I don't remember the guy's name.  There was a lot of discussion/argument at the time and I never heard of any resolution.  I also never had a problem with out of band TX.

[WRXB215]

@UncleYoda That is my understanding as well. A GMRS "type certified" radio is not supposed to be able to transmit outside of the GMRS frequencies in any form or fashion.

[SteveShannon]

12 minutes ago, WRXB215 said:

@UncleYoda That is my understanding as well. A GMRS "type certified" radio is not supposed to be able to transmit outside of the GMRS frequencies in any form or fashion.

That’s not correct.  A GMRS radio could be certified for multiple services. The last sentence (italics) could be interpreted to prohibit transmission in VFO mode. Here’s the rule:

No GMRS transmitter will be certified for use in the GMRS if it is equipped with a frequency capability not listed in § 95.1763, unless such transmitter is also certified for use in another radio service for which the frequency is authorized and for which certification is also required. No GMRS transmitter will be certified for use in the GMRS if it is equipped with the capabilities to operate in services that do not require equipment certification, such as the Amateur Radio Service. All frequency determining circuitry (including crystals) and programming controls in each GMRS transmitter must be internal to the transmitter and must not be accessible from the exterior of the transmitter operating panel or from the exterior of the transmitter enclosure.

[UncleYoda]

But... this was about ham radios, guys.

[SteveShannon]

16 minutes ago, UncleYoda said:

But... this was about ham radios, guys.

Ahh, so it was. I apologize. 

[SteveShannon]

No, I don't believe there are any part 97 rules which prohibit ham radio stations from transmitting on frequencies other than the ham bands.  There is no certification of ham transmitters (except linear amplifiers).

There are rules within some of the services which prohibit certifying transmitters for those services if they can be used on ham bands, and there are rules which prohibit using transmitters which are not certified for the service, but there are no specific rules in Part 97 that say a radio may not be tuned out of band.

[WRTC928]

The 5RM is a ham radio, and there is no "type certification" as such. Amateur radio licensees aren't limited as to what equipment they can own or use, only what frequencies they can transmit on. I just don't program in any frequencies which are outside those authorized for my technician license.

[UncleYoda]

2 hours ago, WRTC928 said:

The 5RM is a ham radio, and there is no "type certification" as such.

All that is understood.  Apparently you didn't read or understand the OP and followup posts I made.

 

I was trying something similar last night on a couple of old UV-5Rs that have RX problems and aren't as useful for normal operation anymore.  Unlike the 5RM/K5+ those do have frequency range limits that can be adjusted.  I was able to get one programmed with RX-only channels for GMRS plus normal TX/RX channels for 2m/440 and have only 2m/440 allowed in VFO.  I tried an opposite approach on the other, making it as close to a certified GMRS unit (like the UV-5Gs I have) as possible.  I wasn't able to come up with a frequency setting pair to block VHF in VFO (it has separate range limits for VHF and UHF).  I may go back and try leaving the VHF frequency settings blank or set to 000.000.  I can always do what I did on the other one if there's no solution to getting just GMRS.