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MJF 969


'Santa',

Almost any place that sells Ham equipment. 'AES'

or Amateur Electronics Supply, is the first that comes

to mind, but they aren't the cheapest place around...

- 'Doc




</p>
 
Thanks Doc. I was hoping to find a used one but no luck yet. Do you know of any other meters that may be as good or accurate? I have read somewhere that dosy can be as much as 20 % off is this true? I use it for swr checks and rms readings mostly. Or is there a way to set it accurately? Hey what's going on in Uncle Jims forum? I can't log on to forum?



Thanks

Santa


</p>
 
Santa,

Almost any of the 'medium' priced meters will work as

well as any will. I think it's more a matter of what 'style'

meter you want than anything. I've never had a 'Dosey'

meter so can't say from first hand, but they seem to be

a bit 'liberal' from what I hear. Can that be corrected?

Beats me, but why bother? Why not get a meter that

works right the first time?

U.J.'s board, actually 'BraveNet' has had security problems

lately. Earlier today it was up and going, but this evening

it's down again. It shouldn't take much longer for them to

get things running again (I hope). Cleaning up a system

after it's been 'hacked' isn't easy, and just takes time...

- 'Doc




</p>
 
I thought the 969 was a 300w ant tuner?

Or am I just sleepy and missing something here?

Sorry, just curious. <img src=http://www.ezboard.com/intl/aenglish/images/emoticons/smile.gif ALT=":)">


Jerry
TW350
CDX351</p>
 
Santa',

Maybe I didn't say that correctly. Most SWR/watt

meters are accurate enough, meaning that they

are probably correct to within 10%. From what you

have said, and from what I've heard from others,

the 'Dosey' line of meters seem to be less accurate

than that. The circuits in an SWR/watt meter are

no secret, and fairly standardized, so 'Dosey' ought

to be at least in the same 'ball-park'. But also, it

seems to be the majority opinion that they aren't. I

don't know why that would be, I've never had one.



Having had several SWR/watt meters, I can say that

most of them are accurate enough for anything I'll

ever need one for. I try to stay away from the 'junk'

meters, and see no sense in having one of the

'lab-grade' meters (meaning I'm too cheap). That leaves

a whole 'range' of meters that will satisfy my SWR/watt

meter needs. I think the biggest differences are in

'style' how the meter is constructed. If you find one

that suits your needs, it will probably do it's job just

fine.

- 'Doc



(If you haven't figured it out by now, I'm not going to

recommend any particular brand. What ~I~ may

'settle for', may not be what would satisfy you.)




</p>
 
Thanks again Doc. I do not own a mjf 969 but though it was a good meter or swr/watt meter. Both of mine are dosy & came from (store credit) from the (big little c.b.shop of Texas).Sorry no names please. If they are 10% off then if my radio puts out 20 watts then -2 would be 18 watts. I think I can live with that. No need to recommend one because at the time these were all that they had in stock.So I'll live with them because I to do not want to spent a lot of money on them. And best of all they work. But not the most accurate.



Thanks

Santa


</p>
 
I bought a DOSY several years ago because I wanted the antenna switch built in. I ended up using it for a while then moved on to a MFJ Versa Tuner V.



While my 8 pill reads ~ 1200 watts on the MFJ and the VFD, it would constantly read 1600 – 1800 on the DOSY.



Do you really need an accurate watt meter?



As for the SWR portion on the meter, I think they are a little more accurate. Since you have to calibrate every time.



I have an idea to check the accuracy of a SWR meter. Doc please let me know what you think.



1.&nbsp &nbsp &nbsp &nbsp Set up the SWR meter as normal.

2.&nbsp &nbsp &nbsp &nbsp Find a channel that reads 1.5.1 or something that you can easily line up the needle.

3.&nbsp &nbsp &nbsp &nbsp Now hook up the SWR meter backwards.

4.&nbsp &nbsp &nbsp &nbsp Your FWD and REV switches are now backwards.

5.&nbsp &nbsp &nbsp &nbsp Recheck your SWR and verify it is exactly the same.

6.&nbsp &nbsp &nbsp &nbsp Return your meter to the normal configuration.





This may not work on all SWR meters. Try at your own risk and all of those other disclaimers.




</p>
 
Is there a way to calibrate the dosy to be some what more accurate? Thats a big difference you have there Skip Talker. Also Tumbleweed I may have the wrong # for the mfj. Sorry But I think you are right.



Santa


</p>
 
santa, it is a ant. tuner 160 - 6 m. i run one it seems fairly accurate within a half watt of a bird. the thing i noticed is going from high to low 30w - 300w 10 watts on reads about 8 on the high setting . i love the tuner section though except it's only 300watts it also has a built in dummy load. aand the 2 position ant switch for coax. oh yeah the lamps burn out real quick in them for some reason , but easy enough to replace with a better one from rat shack. check out the reviews for this and alot of other gear on www.eham.net


</p>Edited by: <A HREF=http://pub86.ezboard.com/udarkrfoverlord.showPublicProfile?language=EN>darkrfoverlord</A> at: 3/14/02 11:14:37 am
 
Skip Talker,

If I were going to check one, I'd do it into a

known load, such as a dummy load. If try

to do it into an unknown source, such as an

antenna, you don't really have any idea of

what reactances may be present, and the

results won't have much meaning.

- 'Doc




</p>
 
Thanks darkrfoverlord, sometimes when i look at numbers after working all night i get them mixed up. but this is aiso a swr meter to correct?



Santa


</p>
 
yep, it's the cross needle type, it will tell you the reflected pwr. without having to do all that math stuff.


</p>
 

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