Codan 9350 Autotune

Submitted: Thursday, Mar 30, 2006 at 07:58

ThreadID: 32337 Views:2343 Replies:5 FollowUps:6

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Disco123

I've been having trouble with my HF install (no surprise ... I did it myself). I seem to receive ok but can't transmit. The radio is saying it is tuning ok but the tech's say there is little transmit power despite the transceiver putting out 75 watts as measured by their SWR meter.
I've had everything checked except the autotune - would there be any members in Adelaide with a 9350 who be able to park their vehicle next to mine so I can connect my transceiver / cables to your autotune and see if I can transmit then?
I live in Belair but can drive any reasonable distance. Any time on the weekend except Sunday afternoon would be ok.

Thanks

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Reply By: Gu_Patrol - Thursday, Mar 30, 2006 at 08:23

Thursday, Mar 30, 2006 at 08:23

Do you have the NGT radio? I've got the Codan 8528 with 8551 ant you swap over with if thats compatible ,only takes 2 min to change over

AnswerID: 163814

Follow Up By: Disco123 - Thursday, Mar 30, 2006 at 09:00

Thursday, Mar 30, 2006 at 09:00

I've got an 8528 as well. If the 8551 antenna takes the same cable as the 9350 it should work.
Where are you based?

FollowupID: 418613

Reply By: Member - Tony G (ACT) - Thursday, Mar 30, 2006 at 08:49

Thursday, Mar 30, 2006 at 08:49

One thing I found with the Codan I had was that you must have a good repeat good earth for the autotune. If not this will affect the transmit.

AnswerID: 163824

Follow Up By: Disco123 - Thursday, Mar 30, 2006 at 09:02

Thursday, Mar 30, 2006 at 09:02

Thanks Tony - yes I've been warned about this. I've got what I think is a good earth and even tried attaching a jumper cable from the antenna base to the chassis as a temporary additional earth but this made no difference, so I don't think earth is the problem.

FollowupID: 418614

Reply By: Gu_Patrol - Thursday, Mar 30, 2006 at 09:17

Thursday, Mar 30, 2006 at 09:17

I'm in Campbelltown whats your email address and I'll write 2 u

AnswerID: 163830

Follow Up By: Disco123 - Thursday, Mar 30, 2006 at 09:26

Thursday, Mar 30, 2006 at 09:26

Thanks - grant.gibson@ozemail.com.au

FollowupID: 418617

Reply By: Footloose - Thursday, Mar 30, 2006 at 10:03

Thursday, Mar 30, 2006 at 10:03

If the radio is giving you two high piched "pass" tones, then the aerial is tuning and is Ok. When you say there is little trasmitted, do you mean on tune or when you talk ? It may still be a radio problem eg mic.
If you mean it trasmits but not very far, it could be a number of things.
The 9350 can be attached to an 8528 but NOT if its got an AD card in it running an 8551 aerial.
So basically you can run your cables to another 9350 installation but not an earlier autotune.
Good luck.

AnswerID: 163840

Follow Up By: Disco123 - Thursday, Mar 30, 2006 at 12:53

Thursday, Mar 30, 2006 at 12:53

Yes - I'm getting the "pips" pass tone.
There's little transmission when I talk. I've had the remote head, transceiver and mike bench tested and they came out fine. I've also checked the cables for for impedance (? - ohms) and they came out ok.
I was told that even if the antenna tunes ok if there is any fault there, the transceiver powers down and this could be the cause of my trouble. That's why I'm trying to trial another antenna. My 9350 doesn't have an AD card.

When i've tried to call VKS scheds they say it sounds like a mike or power problem. The mike is ok as it's been tested and I have 2 separate power leads running to the main cranking battery so this should be ok too.

I bought the unit combo (8528 and 9350) from Sydney but had an independent tech test it before I bought it and it worked fine then.

FollowupID: 418649

Follow Up By: Footloose - Thursday, Mar 30, 2006 at 12:58

Thursday, Mar 30, 2006 at 12:58

To save boring people out of their scones :)) you can email me at jimshire1ATiprimusDOTcomDOTau for more info.

FollowupID: 418650

Reply By: signman - Friday, Mar 31, 2006 at 08:42

Friday, Mar 31, 2006 at 08:42

Hi Grant
Still having problems?? Just a suggestion..to eliminate either the transciever or the autotune being the fault, make up a long wire antenna (for 8022 from memory its about 7977mm long) connected to the centre pin of the antenna coax, and try that on VKS Ch 2. Also, an emergency long wire would not be a waste of space to carry on your travels.
Regards
David

AnswerID: 164040