NISSEI DG 503 Large Digital SWR RF Power Meter Review

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NISSEI DG 503 Large Digital SWR RF Power Meter Review
Specs:
DG-503 is a highly accurate DIGITAL RF POWER METER
1. 3.5 inch LCD digital display
2. LCD backlight is convenient for users to read
3. at the same time show forward wave reflected wave]
4. HF/VHF, UHF switching key
5. equipped with 13.8V DC power line
Frequency range: 1.6-60MHz 125-525MHz
Frequency correction point: 14MHz-50MHz 145MHz-435MHz
Use function: 0-200W
Test function: forward reflective power +/-5%
SWR minimum test power: 1W
Loss: 0.1dB
Impedance: 50 Omega
Connector: SO239 N-female option
Weight: 750g
Size 140x84x122 millimeter
Accessories: use instructions, DC power line
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[@cajuncoinhunter]

I missed a Ham Fest on the 11th .... Over 400 attended not bad for the first time event , people from all over the country were there ..... Great door prizes and Giveaways..... I hated too miss it ....

[@TheElectronMan]

No doubt I love ham fests we have one next month always a bunch of cool stuff there and some bargains

[@cajuncoinhunter]

@@TheElectronMan April is always a great time for a Ham Fest , nice weather in your neck of the woods. It was beautiful weather Saturday , the Boy Scouts cooked about 15 gallons of Jambalaya outside and about forty people brought side dishes , I'm gonna call Barry and see if anyone got any footage for you tube .....

[@TheElectronMan]

@@cajuncoinhunter Man now that is living :) Give me a big pot of Jambalaya and some Crawdads I will go to town...

[@gglee1720]

Can you do video on calibration that you did? Or any manuals available just in case when I get mine

[@waynecavanaugh1726]

I have one of these as well and am curious how you calibrated yours. Mine seems to have calibration issues as well. I have the so called service manual but those instructions are incomplete. Did you need to calibrate HF and the VHF/UHF parts of the meter?
I checked out the service manuals calibration procedure. The HF side seems pretty straight forward needing only adjustment of the two multi-turn potentiometers. The VHF/UHF side needs adjustment of the pots and CV1 which I believe is a variable capacitor inside the shielded sensor which is soldered shut. The shielded box has two access holes that look to have adjustment screws but no identification for CV1 unless it is inside the solder shut box. I did not want to open the sensor box needlessly but that is probably where CV1 is identified.

[@TheElectronMan]

Yes I adjust both HF and VHF HF is done by the two blue variable caps and I just used one of the other pots on mine to get it calibrate on VHF which was just the power was showing a little low on VHF hopefully that helps it's been awhile since I did mine, good thing it is still working great,,

[@Wheel-1]

#TheElectronMan Nice . Well built product Options are a plus . will it work for 10/11 meter AM SSB ? Thanks for your time

[@forgetyourlife]

No averaging for SSB isn’t a problem?

[@TheElectronMan]

Not really I just use it as a reference for swr and power I pretty much know what I should be outputting so it works great for that.. I do like it holds the peak for a second or so a quick look up and I know i am good to go... My BK service bench meter is much more accurate, designed for working on a radio but to me if you know your setup it's really just a way to make sure it is performing as expected, so .01 accuracy is not required.

[@101blog]

Good one they are all a bit off some more than others .. not sure what is acceptable for a given power level/frequency I suppose thats a matter of oppinion!

[@cajuncoinhunter]

It's pronounced Knee-Say which is Japanese American .... Not a bad deal at all , I do like MFJ products though...