1. You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
    Dismiss Notice

SWR/Watt/Mod

Discussion in 'CB and Export Equipment and Accessories' started by SuperDave, Oct 10, 2012.

  1. SuperDave

    SuperDave Active Member

    Joined:
    Sep 10, 2012
    Messages:
    141
    Likes Received:
    5
    Can some one recommend me a SWR/Watt/Mod meter? I have a Workman 201s, RadioShack and another cheapo meter, but I would like a fairly good meter. I would also like for it to measure PEP.

    I want keep it around the $115 range.

    Recommendations?


    Comments on this one?

    Dosy Inline Watt Meters TC-4001P


     

  2. Robb

    Robb Yup

    Joined:
    Dec 18, 2008
    Messages:
    10,867
    Likes Received:
    2,511
    Some of the MFJ watt meters are true peak reading meters.

    However before I bought the Autek WM-1, it was highly recommended by more than a few Ham guys. You might find one used for around ~$120 or so . . .
     
    Shadetree Mechanic likes this.
  3. KC9Q

    KC9Q Supporting Member

    Joined:
    Jan 14, 2012
    Messages:
    266
    Likes Received:
    66
  4. SuperDave

    SuperDave Active Member

    Joined:
    Sep 10, 2012
    Messages:
    141
    Likes Received:
    5
    I've got that one. Do a continuity test with that meter and tell me what happens.. my meter buzzes like crazy.
     
  5. Beetle

    Beetle Sr. Member

    Joined:
    Dec 7, 2005
    Messages:
    2,876
    Likes Received:
    731
    How do you do a "continuity test" with ANY SWR/Power meter?

    That Radio Shack meter may have a "PEP" or "Peak" switch setting, but don't bet the farm on how reliable it is. In order to measure PEP, the meter must have a source of power (batteries or wall wart) for the active electronics needed. This RS junker, and many other brands, switches a capacitor across the meter movement to somewhat simulate a "peak" function. But without the circuitry to actually compute the RF waveform and provide a reliable meter indication, it ain't true PEP and never will be.
     
  6. TonyV225

    TonyV225 W9WDX Amateur Radio Club Member

    Joined:
    Apr 18, 2005
    Messages:
    5,824
    Likes Received:
    290
    You should show continuty or your meter would be more of a piece of junk than you think it is now. If you guys ever sell those Rad Shack meters pm me a price.
     
  7. SuperDave

    SuperDave Active Member

    Joined:
    Sep 10, 2012
    Messages:
    141
    Likes Received:
    5

    Checking continuity in the connectors for the coax on the back of the meter. Touching the center of the connector with one lead and the outside of the other connector with the other lead (from the multi meter). When I do this I get a "buzz".

    Is that suppose to happen? I know when you check you coax you don not want to hear that... Im no pro, so maybe it's ok for a meter to do that because of the wiring inside?
     
  8. W5LZ

    W5LZ Crotchety Old Bastard

    Joined:
    Apr 8, 2005
    Messages:
    6,832
    Likes Received:
    754
    Without an explanation, which isn't all that simple, you've got it right. It can show a short because of the wiring inside. What appears to be a short at 'DC' (direct current) isn't necessarily a short with AC, all RF is AC (alternating current).
    - 'Doc
     
    1 person likes this.
  9. SuperDave

    SuperDave Active Member

    Joined:
    Sep 10, 2012
    Messages:
    141
    Likes Received:
    5
    Gotcha Doc. So technically there is nothing wrong with my RadioShack meter? I just want to make sure I'm on the same page as you.


    I still want a new meter with the 3 functions I mentioned.
     
  10. W5LZ

    W5LZ Crotchety Old Bastard

    Joined:
    Apr 8, 2005
    Messages:
    6,832
    Likes Received:
    754
    I can't say if there's anything wrong with your meter or not. I don't -think- there is based on a continuity test though.
    - 'Doc
     
  11. The Jerk

    The Jerk Active Member

    Joined:
    May 6, 2008
    Messages:
    642
    Likes Received:
    51

    I would agree...what the multimeter was reading likely has nothing to do with condition of the SWR meter.

    That meter likely uses the shield as an electrical ground and the center pin for an electrical positive...they have some connectivity somewhere in the SWR meter (or it wouldn't work).
     
    1 person likes this.
  12. Beetle

    Beetle Sr. Member

    Joined:
    Dec 7, 2005
    Messages:
    2,876
    Likes Received:
    731
    Ah! I thought you were talking about using the SWR meter like an ohmmeter - a function I've never seen on ANY SWR/power meter. You're talking about using an actual multimeter to do the test ON the SWR meter; a whole different thingy altogether. I agree with 'Doc and the rest: your meter MAY be good. Or not. Easiest way to find out is borrow a known-good meter and see what it says.

    And as far as measuring your modulation, no meter will come close to an oscilloscope.
     
    1 person likes this.
  13. SuperDave

    SuperDave Active Member

    Joined:
    Sep 10, 2012
    Messages:
    141
    Likes Received:
    5
    I guess the same goes for measurings wattage and not using a bird?


    Well my bubble has been bursted! haha Well Based on my price range does anyone have any other suggestions? Dosy or MFJ?
     
  14. psycho

    psycho Running a special on our rooms!

    Joined:
    Aug 25, 2006
    Messages:
    3,377
    Likes Received:
    1,134
    Buy a cross needle meter for power and swr.......so simple even Sarah Palin could use it. You'll know something is wrong before the smoke gets let out.
    Autek WM-1 is even easier to read but customer service sucks.
     
  15. Robb

    Robb Yup

    Joined:
    Dec 18, 2008
    Messages:
    10,867
    Likes Received:
    2,511
    Still think that the Autek is your best bet for the best meter.

    However, a MFJ that has a peak reading circuit in it will be the cheaper alternative - IMO . . .
     

Share This Page

  • About Us

    The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.
  • Like us on Facebook

  • Premium VIP Member

    The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Care to buy us a beer? We'd really appreciate it!

    Donate to us!