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Dosy TC 3001 p1 meter

Klint

Active Member
Mar 13, 2019
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Do these meters pretty much read average watts and not so much peak ? And how accurate are these meters ? (New )
 

2NC995

DAN
Feb 23, 2008
2,219
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I believe, at least in a sense, that it doesn’t actually do either.

The reason I say that is that it doesn’t have an average setting, but doesn’t seem to have an true peak reading circuit either.

So...what it’ll show you is a simulated peak power.

Not to say it won’t work just fine for you. It might do everything you want and more.

Edited to add:

Just as something to consider...the price of the Dosy gets you very close to a true peak reading meter.
 
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2NC995

DAN
Feb 23, 2008
2,219
3,958
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Just seems to read on the tight side !!

Somewhere around here there was a post about that model Dosy, or one like it, and if I remember correctly Dosy was good about accepting it for recalibration.

I doubt that any amount of calibration will make it perfect across the scale, but at least they can make it read as designed.

For the most part, I view these things as a relative measuring tool.
 
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Klint

Active Member
Mar 13, 2019
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Yea I can see why.. lol That thing has undershot everything that it has been hooked up to.. haha
 

groundwire

Sr. Member
Jul 19, 2014
805
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+/- 15% full scale accuracy on the meter movement. Sounds like your readings are correct to me. Pshh, even bird meters are only +/- 5% full scale. Everyone thinks they are the most accurate lab meter, Nope.
 
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fourstringburn

W9WDX Amateur Radio Club Member K5KNM
Feb 11, 2007
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NEW MEXICO
Look for meters that require a 12v power connection other than for the meter light, those ones have active peak reading circuitry.

The Daiwa 901 model are popular on this forum and can be bought new around $140 or less.

Don't let the cross needle type scare you off, once you get used to them you may find they're better. The modulation meter on a 3 window Dosey is useless.
 
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2RT307

Sr. Member
Nov 22, 2011
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Texas
Look for meters that require a 12v power connection other than for the meter light, those ones have active peak reading circuitry.

The Daiwa 901 model are popular on this forum and can be bought new around $140 or less.

Don't let the cross needle type scare you off, once you get used to them you may find they're better. The modulation meter on a 3 window Dosey is useless.


Well, if you're easily entertained by a wildly swinging meter, it's not TOTALLY useless. :LOL:

73,
Brett
 

Tokin

The Man With No Shoes
Oct 31, 2019
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SandBox
Somewhere around here there was a post about that model Dosy, or one like it, and if I remember correctly Dosy was good about accepting it for recalibration.

I doubt that any amount of calibration will make it perfect across the scale, but at least they can make it read as designed.

For the most part, I view these things as a relative measuring tool.
They will have you send it to their repair guy in Indiana. He mainly works on Dosy but can work on other meters and can calibrate most all meters. Very nice people, been dealing with them for years.
Now as for Dosy, the're truck stop quality meters. The parts they use to manufacture their meters are the cheapest of cheap. The last set I bought was a dud.
I believe this is the number for QP Inc repair (574) 295-6884
 
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Klint

Active Member
Mar 13, 2019
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They will have you send it to their repair guy in Indiana. He mainly works on Dosy but can work on other meters and can calibrate most all meters. Very nice people, been dealing with them for years.
Now as for Dosy, the're truck stop quality meters. The parts they use to manufacture their meters are the cheapest of cheap. The last set I bought was a dud.
I believe this is the number for QP Inc repair (574) 295-6884
Ok thanks for your help
 
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dxChat
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  • @ ButtFuzz:
    on the connector with the green wire, if you short that to a nearby black wire, the power supply will turn on. (for use as a bench supply or whatever)
  • @ ButtFuzz:
    And IIRC, the purple wire is -12VDC, but that is from memory and it does not serve.
  • @ ButtFuzz:
    So if you need, say, 7v, connect + to the Yellow wire and - to the Red wire.
  • @ ButtFuzz:
    or or you need 9v connect + to the yellow wire and - to the orange wire. note: not all PSU's have the orange wire nowadays, as many manufactures had the voltage regulation on the motherboard, and all the power supply gives is 12 vdc
  • @ BJ radionut:
    Thanks ROB will check it out!~!! got to clean the work bench a little make room for that big case :)