| Author |
Message |
    
Adams_radio
New member
Username: Adams_radio
Post Number: 1
Registered: 10-2007
| | Posted on Wednesday, October 03, 2007 - 5:45 pm: | 
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I have done this mod with very disappointing results. I did it to the Cobra 25. 2 watt carrier and only 15 watts p.e.p. Way-way over modulated with no way to correct it. I also put one in a cobra 29ltd. 2 watt carrier and 20 watts p.e.p. Same thing with modulation. Anyone help me with this??
I also used one of workman's "replacement" for the 2sc1969. I did it the same way i've done hundreds with the mitsubishi original. It had 2 watts of carrier and 10 watts p.e.p. then within a matter of seconds went up in smoke. Any help would be GREAT!!
Thanx,
Eric |
Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 2619
Registered: 9-2004
| | Posted on Sunday, October 07, 2007 - 1:23 am: |
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eric,
please list all of the steps in the mod that you did.
dont post a link to the instructions.
post the steps in your own words, the way you did them.
i dont like the workman replacement part.
matt
anyone wanting a "clean signal", just look to the left and build one of these!!!
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Adams_radio
New member
Username: Adams_radio
Post Number: 2
Registered: 10-2007
| | Posted on Sunday, October 07, 2007 - 9:29 am: |
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I removed R55,R56,&C61. Put in the EN1230 at R56. Added 68pf silver mica cap at C59. Removed slug from L14. Put in ERF2030 at TR14. That's it!! Supposed to be 9-10 watt carrier with 40 watt pep!!
Thanx,
Eric |
Jyd
Advanced Member
Username: Jyd
Post Number: 560
Registered: 11-2001
| | Posted on Wednesday, October 10, 2007 - 7:31 pm: |
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mod does not work well with a cobra 2000 either.less wattage than 2sc1969. i put a 2sc1969 in my 29 and 30watts pep,also added a varible dead key adjustment as well.i use the vr-4 pot for the modulation to adjust dead key now.it will key 1/2 watt and swing full power or 12 watt key and swing full power.forgot to add the hi and low dead key switch on the anl switch.best results for any 29ltd or nwst |
Adams_radio
New member
Username: Adams_radio
Post Number: 3
Registered: 10-2007
| | Posted on Friday, October 12, 2007 - 5:23 pm: |
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Thanx for you input Jyd!! I know the 1969 is the best part. But as it becomes more and more scarce i am not gonna pay a fortune to gain a few watts. I wanna get these new and "replacement" parts down now!! |
Brain_damage
Member
Username: Brain_damage
Post Number: 69
Registered: 4-2005
| | Posted on Saturday, October 27, 2007 - 9:31 pm: |
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eric,i had the 2030 done to both a cobra 25 ltd and a cobra 29 ltd with great results by a local tech and a very good one at that,both of these radios smoke and have very good audio with no problems at all but 1,the 25 when you key up and talk the needle bangs the other side of the meter. i would never part with either of these radios for any price |
Jyd
Advanced Member
Username: Jyd
Post Number: 567
Registered: 11-2001
| | Posted on Wednesday, November 07, 2007 - 12:45 pm: |
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my cobra 2000 keys 2 and swings 27 with 2sc1969 clear |
Linx
Intermediate Member
Username: Linx
Post Number: 103
Registered: 9-2006
| | Posted on Wednesday, November 14, 2007 - 2:28 pm: |
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See, I'm wanting to do it to a few Cobra's I have laying around, but my instructions say to remove R38,R40,C45, install the 1230@r40, 68pf cap@c42 underside, then install the 2030. Supposed to be a strong 40w.
Has anyone tried it this way?
Rob
CEF# 830
Portland, TN
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Linx
Intermediate Member
Username: Linx
Post Number: 104
Registered: 9-2006
| | Posted on Wednesday, November 14, 2007 - 2:37 pm: |
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Adam, upon further investigation, it looks as if you did the mod for the Cobra 29. The Cobra 25 mod is different. This is why you are having poor results.
Rob
CEF# 830
Portland, TN
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Tech808
Moderator
Username: Tech808
Post Number: 14658
Registered: 8-2002
| | Posted on Wednesday, November 14, 2007 - 8:11 pm: |
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Copper Forum Member's,
You can find all of the ERF Conversion Information direct from Eric at EKL listed the the Area/Topic below.
Subscriber (Preview)
» Manuals and Service Documents
ERF2030 29gtl Mod
ERF2030 25gtl Mod
ERF2030 148gtl Mod
AN-2030-5a
AN-2030-4a
AN-2030-3a
AN-2030-1a
AN-2030-2c
Lon ~ Tech808 ~ N9CEF
CEF#808 ~ CEF HAM#001 ~ CVC#002
Tech808@copperelectronics.com
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