UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

G6Tanuki · 9th Nov 2018, 2:40 pm

I don't see a problem with CTCSS: surely these days fitting CTCSS to an old radio is probably easier than having to build an old 1750Hz toneburst??

Also, 12.5KHz spacing having become established as the PMR standard in the 1970s, the supply of ex-PMR radios for conversion in the last few decades would have been easier than sticking with 25KHz and having to retro-fit 'wide' filters to these radios? Did Pye ever do a 25KHz MX290 or PFX?

The 2M-converted Westminster I had in my cars the 1980s was a 12.5KHz-filtered 'S' version. I'd wound the deviation up a bit because many repeaters back then would drop you if your signak was underdeviated, but receive-audio from 'wide' stations always sounded a bit rough.

Truth is, converting old PMR gear is no longer the cheap entry to amateur radio given that use of non-type-approved radios is verboten to entry-level licensees.

9th Nov 2018, 2:40 pm	#327
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 14,007	Re: Users of 2 metre Amateur Band? I don't see a problem with CTCSS: surely these days fitting CTCSS to an old radio is probably easier than having to build an old 1750Hz toneburst?? Also, 12.5KHz spacing having become established as the PMR standard in the 1970s, the supply of ex-PMR radios for conversion in the last few decades would have been easier than sticking with 25KHz and having to retro-fit 'wide' filters to these radios? Did Pye ever do a 25KHz MX290 or PFX? The 2M-converted Westminster I had in my cars the 1980s was a 12.5KHz-filtered 'S' version. I'd wound the deviation up a bit because many repeaters back then would drop you if your signak was underdeviated, but receive-audio from 'wide' stations always sounded a bit rough. Truth is, converting old PMR gear is no longer the cheap entry to amateur radio given that use of non-type-approved radios is verboten to entry-level licensees.