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REVIEW: AN/PRC-148 MBITR, working replica by United-Star

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Old December 13th, 2010, 14:53   #31
Balnk
 
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To be clear...

You're saying for real Peltor Comtac 2's just unplug the MT21 (I think it's a dynamic type) and replace it with the Element electret type microphone? Like in this link...

http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT

Then the Untied Star U238 plug will work with real military PTT's through the real Comtac2s? Just that simple?
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Old December 13th, 2010, 14:55   #32
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Apparently yes, as the only problem is the microphone impedence. Someone would have to try though, hopefully Yannos will be out guinea pig again?
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Old December 13th, 2010, 15:01   #33
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I've been joking about getting a real steel MBITR, now I want this one
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Old December 13th, 2010, 16:46   #34
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hey conker, do you think that Spartan will release a new generation with aluminum box and compatible with standard military spec to work with true comtac / sordin w/o modification! like in reddragon Gen4, but with version cb function programing like you has and not crap talkabout version! hahhaa!
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Old December 13th, 2010, 18:22   #35
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Quote:
Originally Posted by Conker View Post
Apparently yes, as the only problem is the microphone impedence. Someone would have to try though, hopefully Yannos will be out guinea pig again?
I guess I'll still be it! lol
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Old December 13th, 2010, 23:34   #36
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so for the dual channel mode, where on the radio is the channel switch button is it fairly to get access to while in a pouch or would you need to remove the radio to hit the button?
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Old December 14th, 2010, 06:42   #37
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Quote:
Originally Posted by Balnk View Post
To be clear...

You're saying for real Peltor Comtac 2's just unplug the MT21 (I think it's a dynamic type) and replace it with the Element electret type microphone? Like in this link...

http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT

Then the Untied Star U238 plug will work with real military PTT's through the real Comtac2s? Just that simple?
Balnk,

I think you already know that Andy has the replica Comtac, so if you get one of these radios and want to try it you can borrow the mic off of that one before buying one.
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Old December 14th, 2010, 17:11   #38
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Conker i dont get it..so this radio has a the u283 plug that is only used for real steel militairy headsets and the only headset that is working on this radio is a comtac with a replica mc.
Am i am missing something?
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Old December 14th, 2010, 17:44   #39
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Quote:
Originally Posted by jurgen975 View Post
Conker i dont get it..so this radio has a the u283 plug that is only used for real steel militairy headsets and the only headset that is working on this radio is a comtac with a replica mc.
Am i am missing something?
Any military headset will work but you will have impedance problems for the mic for ALL of them... The reason why The Comtacs are the best is because you can swap the mic quickly with a Element one or Z tactical one.
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Old December 14th, 2010, 18:29   #40
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It is most likely the PTT circuit and not the mic. My real Peltor mic works just fine in conjunction with a replica Peltor Comtac headset and a Puxing radio. I have the military mic and not the electret mic.
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Old December 14th, 2010, 18:41   #41
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a mil. Mic is not he same impedance as Civvie radio takes... Some radios can convert and all but not the MBITR
The PTT has nothing to do with the impedance.. Even Peltor Them self says that their (lets say kenwood) Kenwood ptt will not match the impedance..
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Old December 14th, 2010, 20:12   #42
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@Jurgen975, just because the military U238 connector is physically on the radio, does not mean that it is either wired correctly, or the circuitry is correct.

@Yannos, What EagleDriver is trying to say is that a microphone amplifier is most likely needed. This would be included into the PTT's circuit board. I agree with him that switching the microphone probably will not work. I don't 100% know this, it's just an educated guess...

Here is a link to a thread that sort of discuss's this subject...

http://gearsoc.com/board/viewtopic.p...ood+ptt#p24088
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Old December 14th, 2010, 20:17   #43
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THe problem is not the PTT. Its the microphone that is less powerful then what a civvie (United Star PRC-148) radio will be able to pick up. Yeah sure if you have an amplifier it WILL work. If you don't then you need to change the Mic. Even Wey Ferro says that. The Mic is the problem, not the ptt.
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Old December 14th, 2010, 20:27   #44
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Impedence = resistance. Both options would work.

Either A:
- Using a low impedence mic (like the Element)

or B:
- Using a PTT with integrated amplifier.

Which Peltor PTTs don't have, as they are designed for military radios which have one integrated. Thing is, the United Star is designed to work with both Kenwood-type headsets (which don't need one) and military headsets, which do... It would need 2 separate circuits.

Last edited by Conker; December 14th, 2010 at 20:36..
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Old December 14th, 2010, 20:31   #45
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The only PTT that comes with a amp in it is the TCI one. Its specific and cost 260 something.
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