Optima mk3 feed back through speaker

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steepeljack69
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Optima mk3 feed back through speaker

Post by steepeljack69 »

I sold a mk3 to a guy on here,for sum reason he says when he speaks on am and Ssb it sounds like radio has talk back?i tried radio with a sm30 base mic before I sent radio and this didn’t happen,I totally trust Rich just any ideas y it might be doing this?i have told him to send it back and full refund.Just trying t work out y it was fine here?Any suggestions much appreciated.
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13EL121
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Re: Optima mk3 feed back through speaker

Post by 13EL121 »

Maybe wrong mic wiring or RF feedback, bad SWR etc?
steepeljack69
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Re: Optima mk3 feed back through speaker

Post by steepeljack69 »

Can't understand as radio worked fine before I boxed it up and shipped it to the lad,strange.Anyway he's sending it back.
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astradyne
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Re: Optima mk3 feed back through speaker

Post by astradyne »

No doubt when you receive it back the problem won't present itself. Radio's are funny things and can act differently in different circumstances.

13EL121 mentioned a couple of possibilities, all of which are valid. When it arrives back check the mic wiring. That would be my first port of call after doing an initial test.
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13EL121
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Re: Optima mk3 feed back through speaker

Post by 13EL121 »

Indeed funny things can happen. Check mic wiring, board and chassis screws, ground connections etc. Most times the radio is 100% OK and the problem comes from outside the radio. Sometimes there is error 30.

...the error sits 30cm in front of the radio. :D
steepeljack69
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Re: Optima mk3 feed back through speaker

Post by steepeljack69 »

Like I say worked spot on in my shack,I wouldn't have sold it knowing it had issu6.Anyone that knows me will tell u I go the bit extra when I sell any radio gear.I trust Rich who has it so just a funny one,anyway once it arrives back and if it's ok I have it sold straight away,just sorry it didn't work for him,nice radio.
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NightProwler
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Re: Optima mk3 feed back through speaker

Post by NightProwler »

Well I tried it again last night and same thing, Voice coming through the speaker loud. It's a bit like sitting in my shack with a megaphone shouting "CQ DX" but it's 100% fine on FM so the microphone must be ok. Shame as it is a nice radio.
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steepeljack69
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Re: Optima mk3 feed back through speaker

Post by steepeljack69 »

Like I say I tried the radio with the mic I sent wi the radio,the original mic has a fault I was told by the lad who bought it new but the radio did work spot on with that mic so I don’t have a clue,Rich just a quick one did u try original mic?i never tried it as I was told it didn’t work?i know if u don’t plug mic in like shown on the image on the radio then stuff happens.Strange
steepeljack69
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Re: Optima mk3 feed back through speaker

Post by steepeljack69 »

My mates just reminded me I had a Omegaforce that was doing same thing,sent it away to get fixed nothing wrong with it,rf getting in through a splitter box for my aerials.Took it out and radio was fine.
Last edited by steepeljack69 on 11 May 2019, 11:13, edited 1 time in total.
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Buick Mackane
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Re: Optima mk3 feed back through speaker

Post by Buick Mackane »

If richy says it's not working properly then its not working properly, Hes a no BS kinda guy, You probably already know that, But just to reassure you :)
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steepeljack69
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Re: Optima mk3 feed back through speaker

Post by steepeljack69 »

I have already told him I will refund him I don’t have a problem with him,just can’t understand anyway Radio is sold once it returns.
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Re: Optima mk3 feed back through speaker

Post by NightProwler »

I tried it with the original mic but thats not working. I thought RF feedback too so I tried it on another antenna, Dummy load, Different PSU etc etc but it's still there. I never suffer from RF in the shack so I dont put it down to that, Just one of those weird things I guess.
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steepeljack69
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Re: Optima mk3 feed back through speaker

Post by steepeljack69 »

Once it arrives back I will give it a go,lad who was at mine when I tried it before posting it t u is going to haveit.I will let everyone know if radio does it when it’s back at mine.Again my apologies to Rich,I thought radio was ok.Thanks for your understanding.
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NightProwler
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Re: Optima mk3 feed back through speaker

Post by NightProwler »

No problem Mark, These things happen. Mostly to me but they do happen :D
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Re: Optima mk3 feed back through speaker

Post by astradyne »

steepeljack69 wrote: 11 May 2019, 11:12 My mates just reminded me I had a Omegaforce that was doing same thing,sent it away to get fixed nothing wrong with it,rf getting in through a splitter box for my aerials.Took it out and radio was fine.
Didn't you once have a similar issue with an Anytone 5555? Worked great on the standard mic but went crazy when you used a K-PO NM532? I think that was down to a splitter box too.
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