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Barry - N4BUQ

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From: "John K5MO via " <johnk5mo=[email protected]>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 27, 2025 10:34:34 AM
Subject: Re: [DRAKE-RADIO] TR3/4 Meters

This phenomenon is one of the long term mysteries of the various Drake lists.

Somewhere I have a tray of 100 EMICO (I think ) edgewise meters I bought that are visually the same as the drake units, but I'm not sure I know where they are, and I never tested them to see if electrically they were the same FS current.

I might launch a search mission, but it will be a day long affair to empty that closet.

John

On Tue, May 27, 2025 at 9:45?AM Steve Wedge, W1ES/4 via <w1es=[email protected]> wrote:

Hi, Craig —

These solutions have been discussed before. The best we have found is that the bouncing meter problem is entirely mechanical. People have tried swamping with capacitance to no avail. It has something to do with mechanical damping.?

Interestingly, it’s only these edge-reading meters that manifest the bouncing problem. In fact, one can see the problem with no power applied at all and shorting the terminals makes no difference.?

I don’t have a scrap meter that bounces or I’d start to get inside it and see if any sort of adjustment could be made.?

The owner of this set has told me that it’s not important

To him but I’d still like to find an answer!

73,

Steve Wedge, W1ES

Time flies like an arrow. Fruit flies like a banana.

Sent from for iOS

On Tue, May 27, 2025 at 09:20, Craig W8CS via <craig_severson@...> wrote:

I hesitate to offer this as it's not what you're asking for, but if you can't find a direct solution, you might try experimenting with some caps across the meter leads to slow down the time constant of the meter response.?

?

Start by adding something ridiculously large (mF-wise)? to see if it over-compensates and makes the meter "too slow," and then adjust down from there.?

--

Craig/W8CS

Greenville, SC