The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

Uncle Ray

G,day mate.

Try this site....

http://www.cbtricks.com/cgi-bin/database/galaxy_db.cgi

Uncle Ray

mate , i've had problems like this on an 858 chassis. Check the electrolitics ( caps ) feeding the input of the audio chip. I had one problem where the cap was open curcuit.
Infact , just replace the caps around the audio amp.
Hope it works for you.

Uncle Ray

perhaps you might want to "juggle" the vco can. Slightly tune it on the band that you're having problems with.

Uncle Ray

Hi Mate , try this http://www.cbtricks.com/cgi-bin/database/galaxy_db.cgi?search=1&all=1&new_hits_seen=60&keywords=&search_field=all&sort_field=0&exact_match=&case_sensitive= or Galaxy DX Radios Model DX45MP Chassis EPT6900-10C Symptom Excessive noise or whistling type no...

Uncle Ray

Gday Mate , sounds like the vco is not locking. Get the service diagram and re-align the vco and asscociated cans.
Good luck !

Uncle Ray

Yeah Il stick around as theres a number of nice guys here AND this website has helped me alot.
Seasons greetings.

Uncle Ray

Hello Guys. As above , what does work is... Receive needle moves. Does TX with Mod on SSB & AM. If I inject a signal around the audio chip you can hear it. If I place a finger around chip there IS a hum. Squelch works ( you can hear it faintly going off and on via the speaker ). PA works. The b...

Uncle Ray

Hi, did you manage to sort out the problem? I"ve got the same thing here - the radio is near spotless and I'd like to get it going. RX is fine after a tune up and realignment of PLL to lock it up. TX works, OK on AM full carier, but low mod almost non existant. SSB is working, but again very l...

Uncle Ray

Hello Guys. As above , what does work is... Receive needle moves. Does TX with Mod on SSB & AM. If I inject a signal around the audio chip you can hear it. If I place a finger around chip there IS a hum. Squelch works ( you can hear it faintly going off and on via the speaker ). PA works. The bo...

Uncle Ray

Good work mate. cheers.

Uncle Ray

Hi mate.

This should / will fix your problem

http://www.cbtricks.com/radios/cobra/13 ... tb1216.pdf

The same for the TRC449.

Cheers.

Uncle Ray

Hello again.

The back of the mic has a metal clip. Just earth the metal clip. This does work on Philips radios...BUT it does not hurt to try.

Uncle Ray

Hi matey...try this... The AM regulator 2SC1419 is WEAK. UNSOLDER it and toss it in the trash. Replace it with a GE-66, ECG-152 or a NTE-152. Relay buzzes on SSB, no am transmit, lights go dim, or the fuse pops sometimes? Replace C179 ( a 2.2uF 25v tantalum cap located near finals) with a standard 2...

Uncle Ray

Hi Matey.
This might sound silly but it does work on Philips radios....Have you tried earthing the mic ? OR have you tried placing a magnet on the back of the mic ?
Cheers.

Uncle Ray

Hi ya bloke. Im not sure about any other forums , this is quite good. Perhaps Rick is on holidays. Mate c190 , yes it is the one near the bum end of the radio BUT you must understand c190 in the Ranger chassis does not mean it is the same in your case. You've got to do some snooping around as to wha...

Uncle Ray

Hello again.

Go to this website and click on ranger / or superstar etc and follow the cuircut layout.
The name may be different but youll find that many radios are identical inside.

http://www.cbtricks.com/radios/index.htm

Goodluck , youll get there in the end. Cheers mate.

Uncle Ray

Hi matey. This might and I say MIGHT be of some use to you... November Tech Tip on the Month: RCI-2980: In some units, you may notice that the frequency will drift when the unit gets warm. This is caused by the "KIA6410S" IC's installed in place of "TA7310P" for IC8 and IC10. To ...

Uncle Ray

Hi mate , go to

cbtricks.com and download the Realistic trc449 diagram. Its pretty much the same.
PS , part numbers may differ BUT you'll work it out.

Uncle Ray

You're a champion Rick , everyone appreciates you.

Cheers Mate

Uncle Ray

right.......

Uncle Ray

Hey I'd love to have a look at this , can you send me a link.

Regards.

Ray

Uncle Ray

cbtricks is your friend. Google it.

Cheers.

Uncle Ray

Hi Mate. Thanks for taking the time to reply. I do realize these radios have plenty of dry joints , but this radio was working till I shorted something out. Yes I know :oops: As I wrote earlier , replaced the chip ( pll ) and the radio now selects frequencys but audio is non existant ( almost )...pw...

Uncle Ray

Thank you Rick , I'll go through the diagram.
Warm regards.
Ray.

Uncle Ray

Sorry guys , any suggestions ?

Cheers.

Uncle Ray

Hi mate , go to this site

http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=3396

Google cb tricks and go to the radio section.

Uncle Ray

Argg !!! The original problem with this was NO TX NO RX. I replaced the PLL chip. Now I still have no tx ( relay clicks over etc ) and very very faint RX. The PLL is working as i can select channels. If I turn the volume up and inject a signal ( local signal ) the RX will come up ever so slightly. A...

Uncle Ray

Hope this works...

Far left hand side next to a solder joint with n/c pins underneath.

Uncle Ray

One other thing...have you ever suffered from freq drift ( only slightly ) with your radio ?
Will put up a foto soon.

Uncle Ray

Mate. As I have said I have the same radio...YES I know where it goes. I am on holidays from today. I will open up my radio and try TRY to copy your photo onto my computer and photoshop a circle around where it goes. I don't know much about photoshop and I dont have a digital camera ( :oops: )..But ...

Uncle Ray

Opps sorry.

Look for the " President Grant DX "...with the 8719 pll ( yes i know ours run the 145146 pll ).

Uncle Ray

Hi mate

I know this is not the exact diagram BUT it has helped me a lot when working on my superstar 3600 11z.
It is simular....good luck.

http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=3396

Uncle Ray

I too also run the 12v batteries in my realistic power mic. No worries and it sounds cool.
I pick mine up from the supermrkt for around $1.99. Just ask for the car remote alarm batteries.

Uncle Ray

Gday mate try this....

http://www.cbretards.com/cbpages/radiomods.htm

Uncle Ray

Will do Rick. Many thanks...

Uncle Ray

Hi ya Rick ! Thank you so much for your response. No I have not found a diagram YET. Just an update on the radio...I put a "clamping voltage " on the PD output of the 861 and low and behold it started working ( still unlocked at pll )...Im stumped at this tells me the VCO is working but th...

Uncle Ray

Hello Everyone. Just recently picked up one of these units ( 18 ch ssb ) The problem is no rec / tx . Can hear static / PLL is in Unlocked postition ( 861 chip ) getting around 5v at prog pins and around the chip. TX / RX light works ( ie it is switching ). Static is fairly loud ( not dull ) squelch...

Uncle Ray

Hello there , you might want to try :

http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=3396

It might help you...goodluck

uncle ray.

Uncle Ray

Hello there , you might want to try :

http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=3396

It might help you...goodluck

uncle ray.

Uncle Ray

I see the expert is back ??

I hope you're not having a go at me as I am certainly no expert.

Again thanks for your help Rick.

Uncle Ray

Yep Ricks the guy

He certainly knows his stuff. Good one Rick cheers.

Uncle Ray

Hello there.. First up I would be checking the xtals for "dry joints" then the caps around the vco area. I have had problems with drift BUT after trial and error found a couple of cheap electrolitics leaking. Try re-soldering the xtals for a start. Goodluck , I appreciate how anoying it is...

Uncle Ray

:P Hey Rick , just wanted to write and tell you how i got on... First I replaced the "choke" and found that the radio was a little more stable. So I replaced the "cap" and now find the radio does NOT drift as much. Sure theres a little drift but NOT as bad. I have opened the clar...

Uncle Ray

many many thank you's Rick , I will try your advice...mate THANK YOU !!!!!!

Uncle Ray

Uncle Ray

Hey Rick sorry to hassle you but where should i be looking if i have DRIFT ( freq ) on LSB with this superstar ? It will drift a bit when it warms up ? any ideas..? If I put freeze spray near L28 ( ? ) it will go back ON freq. Really need some advice. Many thanks .Uncle Ray. ( Oh I tried to post thi...

Uncle Ray

Hey Rick sorry to hassle you but where should i be looking if i have DRIFT ( freq ) on LSB with this superstar ? It will drift a bit when it warms up ? any ideas..? If I put freeze spray near L28 ( ? ) it will go back ON freq. Really need some advice. Many thanks .Uncle Ray. ( Oh I tried to post thi...

Uncle Ray

Hey Rick sorry to hassle you but where should i be looking if i have DRIFT ( freq ) on LSB with this superstar ? It will drift a bit when it warms up ? any ideas..? If I put freeze spray near L28 ( ? ) it will go back ON freq. Really need some advice. Many thanks .Uncle Ray. ( Oh I tried to post thi...

Uncle Ray

Hi Rick. Mate don't take it personaly. I think that they're excited about geting their radio fixed.
I for one find your posts informative.
Do keep up the good work Ol' Boy.
Warm regards from the land of OZ.

The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

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