Oh darn, I did it again. I should have written PRC-74 and M-80.

I just tested connecting an H-250 and an M-80 that I purchased years ago, both connected to a PRC-77. and the M-80 PTT and mic worked fine, good sidetone in the H-250. But how will I hear incoming audio from the PRC-74 with just the M-80 mic attached? Dumb question but I'm all jazzed waiting for Gilbert next month (getting the '74 then) and don't want to wait to learn more.

Oh, one more thing these H-250s with volume controls also come with a plug-in earbud.

Please excuse all this bandwidth.

And thank you,

Clare N2RJB

On Thu, Aug 28, 2025 at 3:39 PM Tim <[email protected]> wrote:

Hi Clare - The usual handset for the "Old Family" PRC-47 is the H-33 which has a carbon mic element. I believe the H-189/250's that are often used with the New Family gear like the PRC-25/77 uses a dynamic mic element and therefore not directly compatible with the Old Family equipment. And different connectors of course. (U-77 versus U-229). Also I don't think I have ever seen an H-250 handset with a volume control. (But I never say never! haha)

Have fun with the PRC-47. When they work, they work great...

Cheers, Tim

N6CC

On Thu, Aug 28, 2025 at 12:09 PM Clare Owens <[email protected]> wrote:

Hi All,

The manual I have for the PRC-47 only shows the use of the M-80 handset. Is there anything in the PRC-47 that would make the use of an H-250 a problem? I have several working Vietnam vintage radios (Prc-68A, PRC-25, PRC-77) and all now have NOS "modern" H-250s with the volume control and I'd like to also use one on the PRC-47 that I will be receiving soon.

Thanks and 73,

Clare. N2RJB

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