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Message |
    
Hotwire
Senior Member
Username: Hotwire
Post Number: 1628
Registered: 1-2005
| | Posted on Tuesday, August 08, 2006 - 9:04 am: | 
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So compression on high and set to the ssb mode is the best for both SSB and AM? I think I'm understanding that correctly. Also it is good to know that when set to manual the compressor does not work and you just have a regular amplified mic.
AWESOME review Paul! As an owner of the mic I very much apprieciate your time and work contibuted to us Copper members. Oh! You even went the EXTRA mile to crack open your mic so I did'nt have to risk busting my own! Again a most grand review. Thanks
CEF491
Hotwire |
Hotwire
Senior Member
Username: Hotwire
Post Number: 1629
Registered: 1-2005
| | Posted on Tuesday, August 08, 2006 - 9:15 am: |
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Paul, The only kind of negative thing mentioned about the mic was the attack time and release time of the compressor. I'm not sure what it means but I think I have an idea. What would be the advantage of a faster attack/release time? thanks |
Tech833
Moderator
Username: Tech833
Post Number: 1423
Registered: 8-2002
| | Posted on Tuesday, August 08, 2006 - 10:37 am: |
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See the charts. If the recovery were sped up, the 'talk power' would improve on any radio.
The Forum Master has asked me to keep the mic, and I plan to acquire a schematic for it soon, so I will work on some moifications for you.
Step 1- Speed up the recovery.
Step 2- Make the manual control the output level adjustment regardless of compression setting.
Step 3- Make the attack quick enough for 'brick wall' limiting.
A lofty goal, but worth trying. The mic is O.K. as-is, don't worry. However, I think this mic can become a real hot-rod. |
Mikefromms
Advanced Member
Username: Mikefromms
Post Number: 924
Registered: 6-2003
| | Posted on Tuesday, August 08, 2006 - 11:39 am: |
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This mic just won't compare to my Superstar DM-452--a $18 mic. This thing must be made for ham radios. I just don't have any good results with my Omega Force S-45. My radio probably can't be helped much anyway since it is loud with a stock mic. But... as I said, it works better with the 452 than the one under discussion.
Mine works, but not like the 452 and it squeals like crazy before I can really push it. I don't want to make myself unpopular on this forum, but I'm just telling the truth.
Anybody else run one of these desk mics on an Omega Force? What is your experience?
Mikefromms
Mikefromms |
Tech808
Moderator
Username: Tech808
Post Number: 10769
Registered: 8-2002
| | Posted on Tuesday, August 08, 2006 - 6:01 pm: |
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Yes, we use it with our MAGNUM S-45 Omega Force and have received nothing but GREAT Audio Report's from all of the CEF Radio Club Member's we have talked with on the Sunday CEF Net's.
So far we have NEVER Received a bad report when using it with the S-3, S-6, S-45, S-9, S-3200B, President Lincoln, 2995DX, 2970DX, 5054DX,Yaesu FT-2800M or any other radio we have used it on.
ALL reports have been VERY LOUD & CRYSTAL CLEAR when making well over 1000 contacts with other CEF Radio Club Member's over the last 7 or 8 months using AM/LSB/USB/FM.
NOTE!
This is just our own Personal Experience with well over 3000 hours of actual on ON AIR TIME talking with other CEF Radio Club Member's and using it EVERY DAY and EVERY SUNDAY during the CEF Radio Club AM & LSB Nets.
Lon
Tech808
CEF808
N9CEF
CVC#2 
&
Shirley
1st Sargant
CEF164
CVC#3 |
Hollowpoint445
Senior Member
Username: Hollowpoint445
Post Number: 1326
Registered: 6-2004
| | Posted on Tuesday, August 08, 2006 - 9:30 pm: |
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Thanks for the review Paul. I have some questions:
Regarding the comparison of the JCD-201M vs. your Shure(444?) on the TS-440, did you adjust the microphone levels using the ALC function of the meter so they were similar? Because you said you saw a 6dB increase in output from SSB to FM mode, did you do the same when changing from SSB to FM mode on the JCD-201M? The reason I ask is you wrote that the radio was being driven harder and you sounded louder with the JCD-201M, and the SSB mode was similarly louder than than FM mode.
You mentioned that you used the power available from the Yaesu's microphone jack, but you didn't with the TS-440? Did you do that so you could test the microphone on battery power?
Have you compared the JCD-201M with another electret element microphone? |
Tech833
Moderator
Username: Tech833
Post Number: 1424
Registered: 8-2002
| | Posted on Wednesday, August 09, 2006 - 12:25 am: |
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It's a Shure model 450.
I did adjust the mic input level so that the ALC deflection was similar. You're supposed to keep the ALC below the half-way point on the meter. Even though the JCD-201M was deflecting to about the half-way point, it stayed near there more often than the Shure.
The TS-440 had DC available on the mic jack, but when I tried using it, the radio would lock into transmit mode, so I just used batteries when testing with the Kenwood.
I have not compared the JCD-201M with another condenser mic on the 440, but when testing was done with the Yaesu, it was a comparison against the stock mic, which is electret. |
Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 1966
Registered: 9-2004
| | Posted on Tuesday, August 08, 2006 - 11:59 pm: |
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paul,
very informative review!
i LOVE the idea that you have one of these and are working on some mods for it.
may i suggest an increase in the bass response?
in your review you said it was lacking.
maybe there is a cap value or something that can be changed.
good luck, cant wait to see what you come up with,
matt |
Tech833
Moderator
Username: Tech833
Post Number: 1425
Registered: 8-2002
| | Posted on Wednesday, August 09, 2006 - 12:34 am: |
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Hi Matt.
Don't misunderstand.... The mic is NOT lacking bass response, it is actually very flat. My Shure has more bass compared to the 201M, but that is a 35 year old mic, and probably a little tired. |
Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 1970
Registered: 9-2004
| | Posted on Wednesday, August 09, 2006 - 11:37 pm: |
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ahhhh, i gotcha; you were not stating that the JCM mic LACKS bass; you were just comparing it to the sound of your shure.
got it!
again, nice review, now i want one!
matt |
1861
Advanced Member
Username: 1861
Post Number: 543
Registered: 2-2004
| | Posted on Thursday, August 10, 2006 - 10:25 am: |
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I,M THINKING OF GETTING ONE . ARE THESE MORE BENIFIT USED ON REGULAR CB OR EXPORT RADIO ? REASON I ASK , I USE A 139XLR , A DYNASCAN 148 AND A OMEGA FORCE AS BASE RADIOS . WONDERING WHICH THIS MIC WOULD BE MOST BENEFIT TO . |
Tech833
Moderator
Username: Tech833
Post Number: 1426
Registered: 8-2002
| | Posted on Thursday, August 10, 2006 - 11:30 am: |
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I don't understand how the mic requirements would be different for an 'export' CB vs. a legal CB. Is there some sort of different mic level requirement? Some frequency response or impedance difference? Please explain and I will try to form an answer for you. |
1861
Advanced Member
Username: 1861
Post Number: 544
Registered: 2-2004
| | Posted on Thursday, August 10, 2006 - 12:43 pm: |
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PAUL , I GUESS THAT ANSWERS MY QUESTION . I DIDN,T KNOW , THAT IS WHY I ASKED . I HAD READ SOMEWHERE THAT USED ON AN OMEGA THEY DIDN,T HELP . I DIDN,T KNOW WHY , SO I WAS WONDERING IF THERE WAS A DIFFERENCE FOR SOME REASON I COULDN,T FIGURE OUT . GUESS NOT |
Tech833
Moderator
Username: Tech833
Post Number: 1427
Registered: 8-2002
| | Posted on Friday, August 11, 2006 - 2:32 am: |
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None that I am aware of. |
Brain_damage
Junior Member
Username: Brain_damage
Post Number: 34
Registered: 4-2005
| | Posted on Saturday, August 12, 2006 - 12:41 pm: |
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I BOUGHT ONE OF THESE MICS FROM COPPER AND HAD ALL KINDS OF TROUBLE WITH IT FROM THE DAY I GOT IT.GOT IT WORKING A LITTLE BIT AND IT STOPPED WORKING, PUT IT ON THE SHELF WITH MY 30 OTHER MICS.LEFT IT SIT FOR ABOUT 3-4 MONTHS. TRUCK DRIVER THAT COMES IN WHERE I WORK HAD 1 AND HE TOLD ME HE HAD THE SAME PROBLEM AFTER A WHILE HE TOLD ME HE SLAMMED IT ON HIS WORKBENCH AT HOME AND ITS BEEN WORKING EVER SINCE.CAME HOME THAT DAY DID THE SAME,SLAMMED IT ON A DIGI-KEY CATALOG BASE DOWN AND ITS BEEN WORKING LIKE THERE WAS NOTHING EVER WRONG WITH IT. LOCALS SAY IT SOUNDS REAL GOOD (MAYBE YOU HAVE TO BEAT STUFF UP TO GET IT TO WORK RIGHT) |
Tech808
Moderator
Username: Tech808
Post Number: 10809
Registered: 8-2002
| | Posted on Saturday, August 12, 2006 - 5:09 pm: |
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RULE #1 ~ NEVER SLAM ANY RADIO or ANY RADIO EQUIPMENT on ANYTHING!
Since 98% of the component's in the JCD 201M are SMT there is NOTHING to jar loose and about the only thing slamming the mic on anything would accomplish is to BREAK the main board or maybe re-seat the batteries if they were not making good contact or Break the VU meter.
Lon
Tech808
CEF808
N9CEF
CVC#2 |
Hotwire
Senior Member
Username: Hotwire
Post Number: 1686
Registered: 1-2005
| | Posted on Wednesday, August 23, 2006 - 1:29 pm: |
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Hello again Paul, I hope you see this since its been a little while since the last post. Your the only one who I think can give me some good advice on this mic. My questions are..
Can the JCD-201M base microphone be compatable with a radio that already has built in compression, such as the Magnum S-9? If they can work together would there be any benefit from it or would the 2 compression circiuts just defeat each other. Please let me know what you think and if any other pros and cons of a setup like this I'm over looking. THANKS |
Tech808
Moderator
Username: Tech808
Post Number: 10922
Registered: 8-2002
| | Posted on Wednesday, August 23, 2006 - 6:41 pm: |
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Hotwire,
I do not know if Paul own's or has used any of the Magnum Radio's or used any radio with the CP1 Speech Compressor and the JCD-201M Microphone as yet but maybe I can be of some help with this question.
Since I do have personal hands on use/experience DAILY with using the JCD 201M with the MAGNUM S-3 / S-6 / S-9 and S-45 radios with the CP1 Speech Compressor (which has a FIXED VALUE ("Non Adjustable") I figured this might help.
When using the JCD-201M Microphone with the MAGNUM RADIO's listed above with the CP1 Speech Compressor in them I used the JCD-201M with the following settings:
(COMP) switch set to: "MANUAL" and the MANUAL LEVEL control turned to the FIRST DOT (MIN).
All report's have always been the same,
CRYSTAL CLEAR & LOUD AUDIO. 
Hope this help's,
Lon
Tech808
CEF808
N9CEF
CVC#2 |
Tech833
Moderator
Username: Tech833
Post Number: 1436
Registered: 8-2002
| | Posted on Thursday, August 24, 2006 - 12:10 am: |
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If you use two compressors in series, you will simply get a faster recovery time being the sum of the two recovery times. Might sound pretty neat. |
Hotwire
Senior Member
Username: Hotwire
Post Number: 1687
Registered: 1-2005
| | Posted on Thursday, August 24, 2006 - 1:16 pm: |
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Paul and Lon, Thats what I wanted to hear! Or should I say read? Anyway, Super cool awesome hooray right on!!
Thanks guys!!!!
Kenny
CEF 491
Hotwire |
Dale
Senior Member
Username: Dale
Post Number: 1328
Registered: 12-2002
| | Posted on Sunday, March 16, 2008 - 2:05 pm: |
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just got done reading some old reviews
was curious if anyone got 1 recently
dale/a.k.a.hotrod
cef426
cvc#64
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