I have a helper rf voltmeter that I've picked up at a ham swapmeet for $5.00..still works but needs calibration.
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----- Original Message -----
From: M M via groups.io <wa6ilq@...>
To:
[email protected]Sent: Thu, 20 Mar 2025 14:23:36 -0600 (MDT)
Subject: Re: [repeater-builder] Does anyone have a manual or schematic for the Helper Instruments PS 250
The only info I've ever found on that supply is here:
It's on page 5 or 6...
I used to use one back in the mid to late 90s. ? Helper was founded by Bill Detwiler (I forget his callsign) around 1975 and went out of business around 1999-2000 after he died.
The the remains were acquired by Zetron.? Zetron, in turn, was acquired by JVC / Kenwood but continues as a company.?? At a recent IWCE trade show the people in the Zetron
booth had no idea that they once sold Helper products (I tease them that they should bring back the RF Millivoltmeter).
Mike WA6ILQ
