Search found 165 matches

by speedracer6g
Friday 25th Jun 2010, 4:40
Forum: CB Radio Amplifiers
Topic: PALOMAR ELITE 450HD PART IDENTIFICATION
Replies: 4
Views: 9879

Re: PALOMAR ELITE 450HD PART IDENTIFICATION

Thanks, I will give that a try and see what happens.

MIke
by speedracer6g
Sunday 20th Jun 2010, 3:49
Forum: CB Radio Repair and Troubleshooting
Topic: uniden pc55 no tx.
Replies: 1
Views: 4474

uniden pc55 no tx.

I need a unit to replace L13. It is marked LB361. Does anyone have one they can get rid of or know where i can find it.

thanks,

Mike
by speedracer6g
Tuesday 15th Jun 2010, 2:10
Forum: CB Radio Amplifiers
Topic: PALOMAR ELITE 450HD PART IDENTIFICATION
Replies: 4
Views: 9879

Re: PALOMAR ELITE 450HD PART IDENTIFICATION

AMP PIC.JPG I replaced the part with a resistor already as seen in the pic i attached. R19 is beside the keying relay. when i key up but on med and high power it stays keyed after you unkey the transmitter. I dont think this is the main cause of this but i would like to get this part back to OEM. T...
by speedracer6g
Saturday 12th Jun 2010, 1:15
Forum: CB Radio Amplifiers
Topic: PALOMAR ELITE 450HD PART IDENTIFICATION
Replies: 4
Views: 9879

PALOMAR ELITE 450HD PART IDENTIFICATION

I have a palomar elite 450hd amp that had a resistor burnt to badly to identify. I cant find any schematic on this thing. Does anyone know what the value of R19 in this amp.

thanks,

Mike
by speedracer6g
Friday 5th Mar 2010, 4:31
Forum: CB Radio Repair and Troubleshooting
Topic: Galaxy 98vhp deadkey 250 watts on ssb???
Replies: 9
Views: 12955

Re: Galaxy 98vhp deadkey 250 watts on ssb???

I found the problem. There was a oscillation showing up on the output of ic7 after a minuit or two. Replaced ic7 njm4558. Works great. thanks for all your help. It was hard to find since it didnt affect the am side.

MIKE
by speedracer6g
Friday 5th Mar 2010, 3:17
Forum: CB Radio Repair and Troubleshooting
Topic: Galaxy 98vhp deadkey 250 watts on ssb???
Replies: 9
Views: 12955

Re: Galaxy 98vhp deadkey 250 watts on ssb???

It appears to be an audio oscillation coming from the mic amp IC7. It is high enough frequency that it is inaudible. things are starting to make sense here finally. I just have to find out what is causing the audio problem now. aarrrgg.

MIKE
by speedracer6g
Friday 5th Mar 2010, 2:45
Forum: CB Radio Repair and Troubleshooting
Topic: Galaxy 98vhp deadkey 250 watts on ssb???
Replies: 9
Views: 12955

Re: Galaxy 98vhp deadkey 250 watts on ssb???

I replaced C149, C144, C146, C145, R172, R174, R169, Q34, D57, AND R171. I checked pin one and there seems to be an oscillation the shows up when things go sour. I checked and the oscillation is present at R171. I was going to trace that to see if i could isolate where the noise is coming from. Any ...
by speedracer6g
Thursday 4th Mar 2010, 15:47
Forum: CB Radio Repair and Troubleshooting
Topic: Galaxy 98vhp deadkey 250 watts on ssb???
Replies: 9
Views: 12955

Re: Galaxy 98vhp deadkey 250 watts on ssb???

thanks for the tips. I will recheck my supply voltages just to make sure. I think i did already but I will recheck to make sure. thanks again for your time and support.

MIKE
by speedracer6g
Thursday 4th Mar 2010, 9:12
Forum: CB Radio Repair and Troubleshooting
Topic: Galaxy 98vhp deadkey 250 watts on ssb???
Replies: 9
Views: 12955

Re: Galaxy 98vhp deadkey 250 watts on ssb???

I checked the output of the balanced modulator IC6 pin 7 and it shows no carrier only audio when things are working properly. However when the radio quits working right i notice that carrier is showing up on pin 7 as well. I have tried to replace ic6 with no results.

MIKE
by speedracer6g
Wednesday 3rd Mar 2010, 14:59
Forum: CB Radio Repair and Troubleshooting
Topic: Galaxy 98vhp deadkey 250 watts on ssb???
Replies: 9
Views: 12955

Re: Galaxy 98vhp deadkey 250 watts on ssb???

I tried replacing IC6 and it still did the same thing. It is almost like a resistor is opening up or there is a bad cap somewhere in the balanced modulator circuit. I talked to galaxy tech and they had no answers. I will keep digging around ic6 to see what components are involved.

thanks,

Mike
by speedracer6g
Wednesday 3rd Mar 2010, 10:01
Forum: CB Radio Repair and Troubleshooting
Topic: Galaxy 98vhp deadkey 250 watts on ssb???
Replies: 9
Views: 12955

Galaxy 98vhp deadkey 250 watts on ssb???

Galaxy 98vhp motorola 2100b service monitor, scope, frequency counter, bird 43p meter, dosy tc3001-p meter, 75 amp power suply, simpson vom meter, digital multimeter, ect. Am works fine, altough on at one time on low power it had no deadkey unless you turned up the rf power. that problem i have not ...
by speedracer6g
Friday 9th Oct 2009, 1:37
Forum: CB Radio Repair and Troubleshooting
Topic: Galaxy 73v
Replies: 1
Views: 5551

Re: Galaxy 73v

i have on of those here in my shop and that threw me off a little bit. I think it has to do with dual watch option. if you turn it off you should be able to use the radio normally. Let me know how you make out.

MIKE
by speedracer6g
Friday 18th Sep 2009, 7:32
Forum: CB Radio Repair and Troubleshooting
Topic: Cobra 150 gtl distortion on high power.
Replies: 2
Views: 5500

Re: Cobra 150 gtl distortion on high power.

Found a service bulliten from cobra. had to install a cap from ground to c607.

http://www.cbtricks.com/radios/cobra/15 ... _10043.pdf

this seems to have fixed the problem. :D
by speedracer6g
Friday 18th Sep 2009, 6:15
Forum: CB Radio Repair and Troubleshooting
Topic: Cobra 150 gtl distortion on high power.
Replies: 2
Views: 5500

Cobra 150 gtl distortion on high power.

Cobra 150 gtl The radio works fine on low power. On high power it gets some distortion like the amc is punching holes in the audio. It only seems to do it during when you first talk like the amc is not working right on the high power side. any ideas? I am working on it here but i figured i would see...
by speedracer6g
Sunday 9th Aug 2009, 5:30
Forum: CB Radio Modifications
Topic: Have an idea for my Uniden 510.
Replies: 21
Views: 33812

Re: Have an idea for my Uniden 510.

I just did this mod in my shop here today. I realy didnt have much need until they quit making the mini mag. I came up with the same results basically. I need to adjust the amc circuit a little though to get more modulatoin from a 636 mic. I have to play around with the amc and mic amp a little. I d...
by speedracer6g
Tuesday 16th Jun 2009, 7:18
Forum: CB Radio Modifications
Topic: Mod for Higher Dead Key With Cobra After ERF 2030 mod
Replies: 5
Views: 10798

Re: Mod for Higher Dead Key With Cobra After ERF 2030 mod

On a Cobra 25 it goes on the center leg of tr16. Sorry about that.

MIKE
by speedracer6g
Sunday 14th Jun 2009, 6:17
Forum: Tech Area
Topic: Need schematic for cobra 25ltd with TDA2003 audio chip.
Replies: 1
Views: 5575

Need schematic for cobra 25ltd with TDA2003 audio chip.

Anyone have a schematic for the new Cobra 25ltd with the TDA2003 audio chip. I did a search and could not find one.

thanks,

MikeD
by speedracer6g
Sunday 14th Jun 2009, 6:14
Forum: Tech Area
Topic: 2SB827 am regulator question in ss3900
Replies: 1
Views: 5874

Re: 2SB827 am regulator question in ss3900

It should run a little cooler if you run lower wattage. It will still generate heat after a while since you are running in FM mode. I would try to put some heat sink compound on tR51. Sometimes they skimp on that at the factory. TR51 gets warm anyway so the more heat you get away from it the more st...
by speedracer6g
Sunday 14th Jun 2009, 5:54
Forum: CB Radio Modifications
Topic: Mod for Higher Dead Key With Cobra After ERF 2030 mod
Replies: 5
Views: 10798

Re: Mod for Higher Dead Key With Cobra After ERF 2030 mod

Sorry I might have that wrong I will check that agian and get back to you.

MIKE
by speedracer6g
Wednesday 10th Jun 2009, 5:41
Forum: CB Radio Repair and Troubleshooting
Topic: Cobra 25GTL
Replies: 3
Views: 7210

Re: Cobra 25GTL

does the radio have any RX audio?
by speedracer6g
Wednesday 10th Jun 2009, 3:11
Forum: CB Radio Repair and Troubleshooting
Topic: Cobra 148 gtl no tx in am rx ok. SSB RX and TX ok
Replies: 0
Views: 5352

Cobra 148 gtl no tx in am rx ok. SSB RX and TX ok

Radio Make and Model: Cobra 148 GTL D PCB Number: PC-332 PLL Number: 8719 Test gear available: Motorolla r-220b service monitor, Freq counter, Scope, Digital and Analog VOM, ect. Symptoms: This Radio had the ERF2030 mod and I guess it never worked and that is why i ended up with it. I got everyting ...
by speedracer6g
Wednesday 10th Jun 2009, 0:53
Forum: CB Radio Repair and Troubleshooting
Topic: Cobra 2000 GTL Sideband Issue.
Replies: 4
Views: 8184

Cobra 2000 GTL Sideband Issue.

Radio Make and Model: Cobra 2000 GTL PCB Number: pc-497aa PLL Number: 8719 Test gear available: Motorolla Service monitor R-2200b, Freq Conter, Digital and Analog VOM, Ect... Symptoms: I am having trouble alligning the sideband on this radio. I can get the tx to line up perfectly but as soon as i go...
by speedracer6g
Wednesday 10th Jun 2009, 0:10
Forum: CB Radio Repair and Troubleshooting
Topic: DX94hp No rx when its cold.
Replies: 1
Views: 4183

Re: DX94hp No rx when its cold.

never mind this. The radio is fine. Aparently this radio will not work with a Mag Mount antenna. At least that is what Galaxy told me. Dont shoot the messenger here Aparently Galaxy said that the 949 and 959 have the same problem. And the rx and tx works fine all the time also the customer had me co...
by speedracer6g
Thursday 4th Jun 2009, 2:28
Forum: CB Radio Repair and Troubleshooting
Topic: DX94hp No rx when its cold.
Replies: 1
Views: 4183

DX94hp No rx when its cold.

Dx94hp I have a new DX94hp here in the shop. It is brand new out of the box and when it is cold outside or the radio is just cold itself here on the bench it will not RX. I have ruled out a cold solder joint because this is the second one in a row that has done this. Has anyone else seen this before...
by speedracer6g
Friday 8th May 2009, 12:15
Forum: Tech Area
Topic: looking for a Cobra 2000 gtl Frequency conter.
Replies: 0
Views: 5754

looking for a Cobra 2000 gtl Frequency conter.

Does anybody have a working frequency conter board out of a cobra 2000gtl. I am looking for one for a base i am working on. The one that is in it is reading 94.200 mhz. Radio is working fine along with the clock.

thanks!! :D
by speedracer6g
Tuesday 24th Feb 2009, 9:50
Forum: CB Radio Repair and Troubleshooting
Topic: cobra 148 gtl no tx in am rx ok.
Replies: 2
Views: 5042

cobra 148 gtl no tx in am rx ok.

Radio Make and Model: cobra 148 gtl-d PCB Number: kepc-332-e6 PLL Number: 8719 Test gear available: scope, comm analyzer, ac/dc meter , freq gen/counter ect. Symptoms: No tx in am mode ,ssb ok in tx and receive. pa working in ssb mode but not in am mode. Rx works in am mode just no carrier or mod. W...
by speedracer6g
Saturday 27th Sep 2008, 13:32
Forum: CB Radio Modifications
Topic: How many have done cobra final upgrade here , does it work
Replies: 24
Views: 43387

Ok then I am not worthy, I get it You have some years on me. Ha Ha :lol: Then that leaves me wondering a little then what is gm? I know for bipolar transistors it displays Hfe gain. What is gm on my meter I was under the impression that the was the gian of the mosfet. You will have to excuse me i am...
by speedracer6g
Saturday 27th Sep 2008, 0:51
Forum: CB Radio Modifications
Topic: How many have done cobra final upgrade here , does it work
Replies: 24
Views: 43387

:roll: Well I dont know what to say to that I got the equipment here to do it and that is that. Non only do the numbers on my B&k model 530 transistor tester not lie my results dont lie either. I may not be Rick Jackson but I do have more knowledge than your average guy. I have 15 years of exper...
by speedracer6g
Tuesday 23rd Sep 2008, 23:58
Forum: CB Radio Modifications
Topic: How many have done cobra final upgrade here , does it work
Replies: 24
Views: 43387

In all sincerity i give the you respect dogem. I learned from the old rf techs that had been doing rf work for 30+ years like yourself and i am sure you can work on an old tram or golden eagle like nobodies business. I dont hate the 1969 finals i use them too. I agree alot of people out there want m...
by speedracer6g
Tuesday 23rd Sep 2008, 12:46
Forum: CB Radio Modifications
Topic: How many have done cobra final upgrade here , does it work
Replies: 24
Views: 43387

The only reason i can see that cobra and uniden havent is due to the fact that they can afford to make the changes or that the cost is higher to go that route. I guess that cost probably the issue there. Ranger took advantage of the mosfets because there boards were actually realy easy to make the c...
by speedracer6g
Tuesday 23rd Sep 2008, 12:23
Forum: CB Radio Modifications
Topic: EXPO B KIT WHAT CRYSTALS ARE IN THE KIT??
Replies: 7
Views: 9819

I have the kits that will work with the 11.3258 crystals so i think i will just lift the 10 pin of the pll and put in the 11.3258 crystal and use that kit. I checked my suplier for the crystals i need to do that mod and they dont have them so i will just change the crystal and mod the pll. thanks gu...
by speedracer6g
Monday 22nd Sep 2008, 9:01
Forum: CB Radio Modifications
Topic: EXPO B KIT WHAT CRYSTALS ARE IN THE KIT??
Replies: 7
Views: 9819

Sorry got the wrong one it is an 11.1125 crystal. I know that the 11.325 crystal is .150 up and down from 11.325. Is it the same for 11.1125.

MIKE
by speedracer6g
Sunday 21st Sep 2008, 11:57
Forum: CB Radio Modifications
Topic: EXPO B KIT WHAT CRYSTALS ARE IN THE KIT??
Replies: 7
Views: 9819

its a 142gtl radio. the mixer crystal is 10.24mhz and the pll is a mb8719.

thanks

MIKE
by speedracer6g
Sunday 21st Sep 2008, 8:14
Forum: CB Radio Modifications
Topic: EXPO B KIT WHAT CRYSTALS ARE IN THE KIT??
Replies: 7
Views: 9819

EXPO B KIT WHAT CRYSTALS ARE IN THE KIT??

I am building a b kit and need the crystall information for that model. I dont have one here in the shop to compare it to. Any information would be appreciated. I already looked at cbtricks too.

Mike
by speedracer6g
Sunday 21st Sep 2008, 8:11
Forum: CB Radio Modifications
Topic: How many have done cobra final upgrade here , does it work
Replies: 24
Views: 43387

Hi guys thought i would chime in on this discussion. heres my 5 cents worth of information. Bipolars have a lower gain than mosfets that is not new news to anybody. That is a plus compaired to bipolars. I will use either one but my favorite is the mosfet because you do get more power out of it compa...
by speedracer6g
Sunday 21st Sep 2008, 6:18
Forum: CB Radio Repair and Troubleshooting
Topic: cobra 148gtl no rx audio
Replies: 6
Views: 8075

SWEEEET :D

thanks Scott for the tip I will have to put that one in my notes. It was c186 by the audio chip. Must of been shorted out I replaced it and it is all good now.

thanks again,

MIKE :dance:
by speedracer6g
Sunday 21st Sep 2008, 4:24
Forum: CB Radio Repair and Troubleshooting
Topic: cobra 148gtl no rx audio
Replies: 6
Views: 8075

I Injected audio befor the pot and everyting works from the point. It seems like the audio is muted or squelced up but cant find where thing are fudged up. transmit works fine. when i put rf into the radio via my service monitor with 1kz tone i get receive on the meter but no sound. I will check the...
by speedracer6g
Saturday 20th Sep 2008, 8:47
Forum: CB Radio Amplifiers
Topic: k-line k100 onboard amplifier boards who has them????
Replies: 7
Views: 13664

TO santafe308 EMAIL ME AT mike@dibertselectronix.com
by speedracer6g
Saturday 20th Sep 2008, 1:11
Forum: CB Radio Repair and Troubleshooting
Topic: cobra 148gtl no rx audio
Replies: 6
Views: 8075

I also checked tr43 and there is 0v on all legs on tx and rx. Also the pcb # is PC-412
by speedracer6g
Saturday 20th Sep 2008, 1:08
Forum: CB Radio Repair and Troubleshooting
Topic: cobra 148gtl no rx audio
Replies: 6
Views: 8075

cobra 148gtl no rx audio

This radio has transmitt and no rx. the needle moves with rx but no audio. I checked the audio chip and it is fine I injected a signal into it and i have audio on the speaker. I checked tr13 and tr12 and the voltages are as follows. TR12 B 0V, C 8.19V, E .72 TR13 B 8.24, C .66, E 8.24 I also checked...
by speedracer6g
Saturday 20th Sep 2008, 0:15
Forum: CB Radio Repair and Troubleshooting
Topic: My gripe.
Replies: 13
Views: 19016

If i ever forgot to thank you Rick I am sorry. Thanks for all your help. It is nice to have a go to guy that has alot of experience. thanks again for all your help. Keep up the good work.

MIKE :D :D :wink:
by speedracer6g
Friday 19th Sep 2008, 9:27
Forum: CB Radio Amplifiers
Topic: k-line k100 onboard amplifier boards who has them????
Replies: 7
Views: 13664

I found out the company i work for has them we just dont have them in stock yet. We are currently getting rid of our rm itally boards first then we are going to those k100 units. I am sure we can get you one if you need them pm me for more info.

MIKE
by speedracer6g
Friday 19th Sep 2008, 8:00
Forum: CB Radio Amplifiers
Topic: k-line k100 onboard amplifier boards who has them????
Replies: 7
Views: 13664

Sorry, nevermind me i found out what i needed to know thanks.

MIKE :D
by speedracer6g
Friday 19th Sep 2008, 6:54
Forum: CB Radio Amplifiers
Topic: k-line k100 onboard amplifier boards who has them????
Replies: 7
Views: 13664

k-line k100 onboard amplifier boards who has them????

I was looking at new products on cbtricks.com and there is a nice kit for an onboard amp. Does anyone know where to get them?? here is the link to look at the setup.

http://www.cbtricks.com/Amp/k_line/k100/index.htm
by speedracer6g
Friday 19th Sep 2008, 5:03
Forum: CB Radio Repair and Troubleshooting
Topic: Cobra 25 ltd classic noise blanker problem.
Replies: 6
Views: 8860

got it going rick thanks for the help. bad diode.

thanks,

MIKE
by speedracer6g
Saturday 13th Sep 2008, 8:52
Forum: CB Radio Repair and Troubleshooting
Topic: What pll chip is in the new Cobra 25ltd radios?????
Replies: 2
Views: 4518

thanks :D
by speedracer6g
Saturday 13th Sep 2008, 3:30
Forum: CB Radio Repair and Troubleshooting
Topic: What pll chip is in the new Cobra 25ltd radios?????
Replies: 2
Views: 4518

What pll chip is in the new Cobra 25ltd radios?????

I am ordering some plls from cobra but and wondering if anybody knows what pll chip it is. The part on the chip just says cobra 25ltd. But what is it? I am looking to save a few bucks by bypassing cobra. If anyone knows please fill me in.

MIKE :wink:
by speedracer6g
Wednesday 10th Sep 2008, 3:00
Forum: CB Radio Repair and Troubleshooting
Topic: galaxy DX-88hml low ssb power am ok.
Replies: 17
Views: 19151

Well i found the problem. I must of bought a bad batch of 2sb827 transistors. I went back to the 754 that was in it and it worked fine. So i installed a 827 that i knew was good and now everything is just fine. that is what i get for ordering from a guy in china. Lesson learned. I check the Hfe gain...
by speedracer6g
Tuesday 26th Aug 2008, 12:50
Forum: CB Radio Repair and Troubleshooting
Topic: galaxy DX-88hml low ssb power am ok.
Replies: 17
Views: 19151

where are the smoothing caps??
by speedracer6g
Tuesday 26th Aug 2008, 12:43
Forum: CB Radio Repair and Troubleshooting
Topic: galaxy DX-88hml low ssb power am ok.
Replies: 17
Views: 19151

ok here goes.

TR49 B 7.5 C 11.5 E 7.35
TR50 B 11.5 C 7.3 E 11.75
TR51 B 11.75 C 7.3 E 12.95
TR52 B 7.0 C 11.6 E 7.0
TR53 B .85 C 7.8 E 1.8
TR54 B 0.0 C .5 E 0.0

R243 46.6 OHM
R241 9.7K