| Author |
Message |
    
Cm3885
| | Posted on Saturday, December 20, 2003 - 6:00 pm: | 
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Im curious as to were the limiter for the 2970 Dx is located.. Im not planning on cutting it out but id just like to know for reference. |
Cm3885
| | Posted on Monday, December 22, 2003 - 9:05 pm: |
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Hello can anyone help me here?????
"sounds of crickets in the background"
Hello????
Anyone out there?????
"again, sounds of crickets in the background" |
Hootyal
| | Posted on Tuesday, December 23, 2003 - 6:26 am: |
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R301...Don't do it..I know people who have and were sorry!!! Garbles everything AM & SSB. Not much fun to try to put back in either. |
Cm3885
| | Posted on Tuesday, December 23, 2003 - 7:55 pm: |
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Were exactly is it located on the board?
I dont want to remove it just find it......
TY |
Weakeststation
Intermediate Member
Username: Weakeststation
Post Number: 241
Registered: 7-2002
| | Posted on Sunday, March 14, 2004 - 5:20 am: |
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mmmm??? I have D-43, but i wouldn't suggest removing it either..... |
Bigbob
Senior Member
Username: Bigbob
Post Number: 1751
Registered: 12-2001
| | Posted on Sunday, March 14, 2004 - 9:25 am: |
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I think hes trying to find out if its missing why don't you guys tell him where it is in relation to front of radio,I don't have one or I would. |
Hootyal
Member
Username: Hootyal
Post Number: 96
Registered: 9-2002
| | Posted on Monday, March 15, 2004 - 8:47 pm: |
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With cover off radio, find vr17(am mod) and vr19 (low power). These vr's are marked on the board. To the left of these vr's are a group of 6 vertically surface mounted resistors, caps and diodes. Starting on the left, counting 1,2,3,4,5,6....the third resistor is r301. I can't remember where I got the component layout, maybe the rci website. But it sure does make things easier to find. Wish I could copy and post. Good luck, Hooty |
431ct
New member
Username: 431ct
Post Number: 2
Registered: 1-2004
| | Posted on Sunday, April 18, 2004 - 11:52 pm: |
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I have an RCI2970 (non-DX model). Does anyone recommend cutting the limiter in this one? Also, has anyone tried using the 2879 finals in place of the 2290s?
What is the radio capable of in terms of output when peaked (AM/SSB)?
Thanks! |
Weakeststation
Intermediate Member
Username: Weakeststation
Post Number: 248
Registered: 7-2002
| | Posted on Monday, April 19, 2004 - 3:34 am: |
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I wouldn't recomend that you cut it in that radio either.. |
Kc0gxz
Advanced Member
Username: Kc0gxz
Post Number: 762
Registered: 3-2003
| | Posted on Tuesday, April 20, 2004 - 5:02 am: |
|
431ct
If done corectly, the 2970 has capabilities of well over 200 watts PEP on both A/M and SSB. But, a few modifications need to be done first in order for it to work correctly and for the audio to remain clean in both modes.
As far as changing the amplifiers' finals, there's only around a 20 watt difference (if even that much) between the two power devices. Not enough there for anyone to ever see or hear a difference.
And, in my way of thinking, the radio doesn't have enough heatsink as it is for the two 2290s that are in it now. Yes, it works, but it also heats up very quickly.
Jeff, kc0gxz. |
Weakeststation
Intermediate Member
Username: Weakeststation
Post Number: 249
Registered: 7-2002
| | Posted on Wednesday, April 21, 2004 - 1:26 pm: |
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HEY WAIT ONE MINUTE...
YOU ARE CORRECT AND I AM WRONG...
Q-43 IS THE MOD LIMITER, FINALLY GOT AROUND TO PLAYING WITH THE RADIO, AND IT WAS ON MY LIST TO CHECK TO MAKE SURE...
YOU ARE CORRECT, IT IS Q-43........ Still wouldn't suggest it being removed....
As for the 2970 non dx versinon, still wouldn't recomend it touching it.. Thier are other things that can be done, and every now and again when you clip the mod limiters, it will cause you severe problems on ssb.. Alot of times people will not be able to understand what you are saying..
DID I MENTION... Q-43 IS CORRECT!!!
(just noticed this isn't the post that mentioned Q43, but it still fits here real good) |
Tech808
Moderator
Username: Tech808
Post Number: 2206
Registered: 8-2002
| | Posted on Wednesday, April 21, 2004 - 2:27 pm: |
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Weakeststation,
How about putting your Pow/Mia Banner in the Picture area of your profile.
Been trying to find one myself to add to my profile.
It looks Good! 
Lon
Tech808 |
Cuddlebear
Intermediate Member
Username: Cuddlebear
Post Number: 133
Registered: 3-2002
| | Posted on Wednesday, April 21, 2004 - 5:57 pm: |
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Pulling a limiter in ANY radio in my opinion is the worst thing you can do. It is a last resort you should do only if you can't get the radio to modulate decently any way else. The 2970 is a good radio from what I have seen. If you tune it up right and set it at 80-95% modulation you'll be great to go. Every single unit I've seen peaked at that spec sounds fantastic. Not overdriven at all. (I've seen 5 so far) I worked on 2 and a Tech here that I help out has done 3.
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Weakeststation
Intermediate Member
Username: Weakeststation
Post Number: 252
Registered: 7-2002
| | Posted on Thursday, April 22, 2004 - 8:21 am: |
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I would put it up, but i am having troubles with my puter, i opened up a something else with a diffrent program, and my flag dissapeared..
Not really dissapeared but it change, so when i go to use it, it won't let me.. Im up a creek for sure, would love to have it flying high here also.. |
Cm3885
Intermediate Member
Username: Cm3885
Post Number: 383
Registered: 12-2003
| | Posted on Saturday, May 01, 2004 - 8:31 pm: |
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Look, guys, I ONLY want to find it to see if its been removed or cut thats all. Why the fuss??? You all keep saying dont remove it, dont remove it, but NOWERE in my message did i ever say i wanted to REMOVE it at all.. Just find out were it is thats all.. OK??
I think some people overreact to this whole limiter deal. JMHO! |
Tech808
Moderator
Username: Tech808
Post Number: 2270
Registered: 8-2002
| | Posted on Saturday, May 01, 2004 - 8:43 pm: |
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Look for R291 and see if it has been removed or 1 side cut.
My tune up specs show ADJUST VR-14 (AMC)or CUT R291.
Hope this help's.
Lon
Tech808 |
Cuddlebear
Intermediate Member
Username: Cuddlebear
Post Number: 145
Registered: 3-2002
| | Posted on Sunday, May 02, 2004 - 11:42 am: |
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Dear Cm3885,
I was not reffering to your post on the 2970 limiter question. I was posting in response to another poster here by the nick 431ct who posted a bit further up. Sorry for the confusion. |
Bullfrog13x4
Junior Member
Username: Bullfrog13x4
Post Number: 19
Registered: 3-2006
| | Posted on Monday, April 17, 2006 - 5:18 pm: |
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1k ohm resistor in series with the emiter of q-43 will open it up butt keep it intact/functional |
