Re: [Elecraft] MD2 microphone
Stephen, The pinout for the MD2 microphone is the same as the MH2 and MH4. Bias requirement is also the same - it needs a 5.6k resistor from the AF signal (pin 1) and either +5 or +8 volts. The pinout matches the mic jack wiring which is shown in the K3/K3S manual on page 13. Download the K3 manual if you don't have it. You may also find the microphone pinout at the G4WPW website which has been preserved at https://www.qsl.net/g4wpw/date.html#others. Hint: connect both pin 7 and pin 8 to the common ground. 73, Don W3FPR On 4/4/2019 4:11 PM, Stephen Prior wrote: I don't know whether anyone can help, but I am trying without any success to get the MD2 microphone working with a SunSdr2 transceiver, which is able to provide the necessary bias voltage I believe. What I am lacking, and have not been able to find online is the original manual for the microphone giving pinout and bias details - for I'm sure that there is something that I must have missed. Thanks and 73, Stephen G4SJP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] MD2 Mike Stand ?
Alan, Elecraft was selling the Heil Boom Mount when they were selling the MD2. 73, Don W3FPR On 2/17/2013 7:59 AM, Alan Fryer wrote: Was there a stand offered or supplied with the MD2 mike ? Had it for years, just now getting ready to use it with a K3... __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] MD2 and K3 Rear Connector
If your going to the trouble of getting the 8 pin connector, why not get a line end on and save on the box, the drilling and the space that will use up? 73 de M0XDF, K3 #174 -- If you have the same ideas as everybody else but have them one week earlier than everyone else then you will be hailed as a visionary. But if you have them five years earlier you will be named a lunatic. -Barry Jones, politician, author (1932- ) On 29 Jan 2010, at 11:39, John Huffman wrote: > Hi - > > I would like to hook my Elecraft MD2 to the rear microphone connector of > my K3. > > I'll get a small box and mount a male 8-pin connector on one end for the > microphone and a cable to a 1/8" plug (stereo or mono?) on the other end > to plug into the K3 rear panel. > > What pins get connected? How is bias connected? Does someone already > make this adapter? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] MD2 mic pinout (was: K3 audio output v headphone sensitiviy)
John, I disassembled the mic plug on my MD2. Here is the wiring by color (warning, it may be different on yours if Heil used a different cable, one never knows). Pin 1 - AF - White Pin 2 - PTT - Red Pin 7 - AF Return (gnd) - shield and black wires Pin 8 - PTT Return (gnd) - Blue. If you have the dongle for the 1/4 inch footswitch jack, it connects with its red wire to pin 2 and its white wire to pin 8. There is no need for any separate 8 volt line (pins 3, 4, 5 and 6 are not connected). For the K3, set the mic bias on in the menu - on a K2 the 5600 ohm resistor on the back of the K2 mic jack between pins 1 and 6 takes care of the bias - of course the K2 mic configuration header should be wired with all pins straight across. 73, Don W3FPR John Clare wrote: Hi Brian and all. I have an old pair of Kenwood HS5 headphones and plugged them in to my factory assembled K3 after donning them. Had to back the AF gain back by about 10% for comfortable listening. I have a question that someone out there with an Elecraft/Heil MD2 mic may be able to help with. I bought it second hand and the previous owner had re-wired to suit Icom. I now wish to use it on my K3 and would like to get the wire color code or find out which color wire the +8v goes to. I e-mailed Heil but they can't or won't tell me. Can any one with an MD2 give me the pin outs by color pllease? John Cl;are VK1CJ. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2 element question
Paul, I strongly believe the same element was used in all the Elecraft mics when Heil was building them, and was referred to as the 'Heil Optimized Condenser Element for the K2'. In any case it is an electret type. All the Elecraft MD2 microphones currently existing were made by Heil. It is a very nice microphone and I would not give mine up without a LOT of 'encouragement'. Now that the MH2 is being sourced by Elecraft, and the MD2 is no longer available. The MH2 still uses a similar electret type element. 73, Don W3FPR [EMAIL PROTECTED] wrote: I have a Proset (from Elecraft) with the included Kenwood adapter and it works fine with the K3. Anyone know what kind of mic element is inside the Elecraft/Heil MD2 Desk Microphone? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2 and the K3
> Does the unmodified MD2 work FB in the K3? > > Thanks, > > Paul N4LCD > Paul, yes it does. That is what I'm using on my K3. Just make sure to turn on front panel bias. (So very easy to do, and even easier to forget to do!) 73 de tom k8tb k3 # fb53 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2 and the K3
John Huffman-3 wrote: > > Will I need to remove the resistors from the mic connector shells of the > MH2 and MD2 in order to use them with the K3? > I don't think so, John. My mics are wired up as per the K2 "standard". Only one is an electret, and has a resistor in the shell. It works OK with the K3. Does the unmodified MD2 work FB in the K3? Thanks, Paul N4LCD ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2 and K3 & MH2 and K3
Absolutely! 73, Eric WA6HHQ [EMAIL PROTECTED] wrote: Will the Elecraft/Heil MD2 work with the K3? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2 Microphone
John, Either will work. 73, Chas At 04:08 PM 1/22/2005, KI7V (John) wrote: Hello, I purchased a MD2 Microphone for my K2 a few weeks ago. I also have a footswitch that I'd like to plug into the Pig-tail but, I have to make a cable for it. Does anyone know if the pig tail requires a stereo (3 conductor) 1/4 in plug or a mono type? Thanks, 73, John - KI7V K2 #3706 FISTS #0 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2 Microphone
Mono de John/W1RT On Sat, 22 Jan 2005 14:08:53 -0700, KI7V (John) <[EMAIL PROTECTED]> wrote: > Hello, > > I purchased a MD2 Microphone for my K2 a few weeks ago. I also have a > footswitch that I'd like to plug into the Pig-tail > but, I have to make a cable for it. Does anyone know if the pig tail > requires a stereo (3 conductor) 1/4 in plug or a mono type? > > Thanks, > > 73, > John - KI7V > K2 #3706 > FISTS #0 > > ___ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2 Mic
Hi Tom. I did this mod this weekend without any problems. I partially removed the heatshrink where required, soldered, and put a single layer of plastic tape around all pins before reassembly. -- Regards, Jim Brown, K5JAZ -- Original message -- From: Tom Mc <[EMAIL PROTECTED]> > Has anyone tried placing the 5.6k resistor for the MD2 microphone into the > plug or into the microphone itself (rather than into the K2)? > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] MD2 Mic
"can someone tell me if the MD2 on the CB-1 base is supposed to move around after it is all mounted together? " Thanks, Stan Rife W5EWA K2 S/N 4216 Hi Stan, OK, you got my curiosity up. My 'Santa to me' box had to be opened to check out your dilema. Threaded the extension into the base the desired amount and locked the knurled nut. Seemed to tighten up just fine. Yes, just a couple of threads engaged into the mic holder but I was able to lock that as well, though not the engagement like the base. Nothing twisted for me after it was assembled. I didn't run across a threaded stud as you described. I may carefully trim the first couple of threads off the mic end of the extension via my bench grinder as these are the tapered starting threads that offer little engagement. I then will assemble with equal number of exposed threads above/below the knurled nutdetails, details!! Doesn't really 'solve' your mystery, but at least another experience. 73, Roger WA7BOC K2#755 __ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2
Phil, I don't understand what needs to be modified - it is plug and play if you are wired for an Elecraft mic already. Those jumpers and the resistor are supplied with every Elecraft mic including the on-sale MD2 - just in case they are needed. What is necessary is that the mic configuration header and mic jack be wired for the 'Elecraft standard' - all header pins wired straight across and a 5.6k resistor on the mic jack between pins 1 and 6. That wiring will support any Elecraft mic that is currently available and I figure for any future mics to be introduced in the future. You alway do have the choice of modifying the wiring at the mic plug if you want to retain the mic header configuration you have been using with other mics. My choice is to always use the Elecraft configuration (I do modify it a bit so I can use mics that do not want voltage supplied to the AF line). 73 Don W3FPR - Original Message - Just received my MD2 and see it is necessary to modify my K@ to use it. It's that rather silly from a marketing stand point? I would have thought plug and play. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2
I would bet, that's the reason they were discounted. Smart move on Elecraft's part, only wish we were advised before hand. Other than that, I'm satisfied with mine. Now when I can get the K2 to talk up, it will be a win-win situation. Later KXBill > Just received my MD2 and see it is necessary to modify my K@ to use it. > It's that rather silly from a marketing stand point? I would have thought > plug and play. > > Phil > > Philip LaMarche > LaMarche Enterprises, Inc. > www.instantgourmetspices.com > 727-944-3226 > (800) 395-7795 pin 02 > Cell 727-510-5038 > FAX- 727-937-8834 > N.A.S.F.T # 30210 > W9DVM > > > > > > -- > No virus found in this outgoing message. > Checked by AVG Anti-Virus. > Version: 7.0.290 / Virus Database: 265.4.4 - Release Date: 11/30/2004 > > > ___ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2 resistor mod - a different approach?
Jean-Francois, Fortunately the Kenwood mic has similar configuration header wiring compared to the Elecraft, differing only in having 5 volts on pin 5 rather than on pin 6. If the Kenwood mic is only used with the K2, you can re-wire the mic plug to grab the 5 volts on pin 5 instead of pin 6. OTOH, if you must retain the Kenwood wiring, proceed as indicated below. If the Kenwood mic is one of those listed in the Elecraft KSB2 manual, you would still add the resistor between pins 5 and 6 at the back of the K2 mic jack and be certain nothing is connected at the mic header to pin 6. To be safe, disassemble the Kenwood mic plug and be certain nothing is connected to pin 6 inside there too - if there is a connection, it should only be used as a tie-point and can be removed (if there are two wires on pin 6, remove them from the pin and connect them together) - I think I have covered all possibilities with that Then on the mic plug for the MD2, connect pin 6 to pin 1 - the 5 volts (direct = no resistor) remains on pin 5 to satisfy the Kenwood mic, and will have the resistor in series at pin 6 for the Elecraft mic requirements. 73, Don W3FPR - Original Message - What are you suggest if I must switch often between an MD2 and a Kenwood hand mic It is a little bit hard to remove and add the jumper each time... Maybe if we can have those jumpers more accessible from dip switches somewhere... ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2 resistor mod - a different approach?
Hi Don, What are you suggest if I must switch often between an MD2 and a Kenwood hand mic It is a little bit hard to remove and add the jumper each time... Maybe if we can have those jumpers more accessible from dip switches somewhere... Le 04-11-24, à 09:21, W3FPR - Don Wilhelm a écrit : Walt and all, Thanks for that info - I should have checked the schematic before I opened my mouth (well fingers anyway). The jumper must be removed from the mic header. Even though FUNC is not used in the K2, the front panel is wired so that it COULD be used (for some future something). This also means that my statement about your mic being able to be used on another K2 is also incorrect. -- but everything does work FB if you remove the configuration jumper. 73, Don W3FPR - Original Message - Thanks for sharing this simple, ingenious approach. I did it this morning. The only thing I forgot to do the first time was to remove the jumper I had across FUNC/5, which kept the FUNC circuit tied to Pin 5. It was obvious something was wrong, and I quickly realized I needed to remove that jumper. Works great now. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraftHelp: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com === Jean-François Ménard / VA2VYZ [EMAIL PROTECTED] Elecraft K2 #4130 http://homepage.mac.com/jfmenard === ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2 resistor mod - a different approach?
I just finished the mod. Pins 5 and 6 go to plated through holes that presented a perfect place to mount the resistor. I cut the leads of the resistor first before soldering so that they would not extend through to the other side of the board. I now have my new "on-sale" MD2 working and when the adaptor arrives for my Heil ProPlus! I can just plug it in and talk (hmmm...assuming my voice is loud enough to not need any messing with the AF gain in the SSB audio path). Not having built my K2, it was a VERY impressive moment when I pulled the front panel off after removing only 6 screws. Wow...pull it off...push it on...pull it off...push it on...COOL! No interconnecting cables. I love the way this radio was engineered. Every fits "just right". Here's a pic of the way I mounted the resistor across pins 5 and 6. http://www.k2ta.com/resistor.jpg Thanks again to both Don and Walt for their help! 73 de Tom K2TA K2 #1117-C - Original Message - From: "W3FPR - Don Wilhelm" <[EMAIL PROTECTED]> To: "Walter Wilson" <[EMAIL PROTECTED]>; "Tom Althoff" <[EMAIL PROTECTED]>; "Elecraft" Sent: Wednesday, November 24, 2004 9:21 AM Subject: Re: [Elecraft] MD2 resistor mod - a different approach? > Walt and all, > > Thanks for that info - I should have checked the schematic before I opened > my mouth (well fingers anyway). > > The jumper must be removed from the mic header. Even though FUNC is not > used in the K2, the front panel is wired so that it COULD be used (for some > future something). > > This also means that my statement about your mic being able to be used on > another K2 is also incorrect. -- but everything does work FB if you remove > the configuration jumper. > > 73, > Don W3FPR > > - Original Message - > > > > Thanks for sharing this simple, ingenious approach. I did it this > > morning. > > The only thing I forgot to do the first time was to remove the jumper I > > had > > across FUNC/5, which kept the FUNC circuit tied to Pin 5. It was obvious > > something was wrong, and I quickly realized I needed to remove that > > jumper. > > Works great now. > > > > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2 resistor mod - a different approach?
Walt and all, Thanks for that info - I should have checked the schematic before I opened my mouth (well fingers anyway). The jumper must be removed from the mic header. Even though FUNC is not used in the K2, the front panel is wired so that it COULD be used (for some future something). This also means that my statement about your mic being able to be used on another K2 is also incorrect. -- but everything does work FB if you remove the configuration jumper. 73, Don W3FPR - Original Message - Thanks for sharing this simple, ingenious approach. I did it this morning. The only thing I forgot to do the first time was to remove the jumper I had across FUNC/5, which kept the FUNC circuit tied to Pin 5. It was obvious something was wrong, and I quickly realized I needed to remove that jumper. Works great now. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2 resistor mod - a different approach?
That's even better..no cutting of lands on the control board as I would have had to do. Thanks once again Don! And Happy Thankgiving to all on the reflector. 73 de Tom K2TA K2 #1117-C - Original Message - From: "W3FPR - Don Wilhelm" <[EMAIL PROTECTED]> To: "Tom Althoff" <[EMAIL PROTECTED]>; "Elecraft" Sent: Tuesday, November 23, 2004 9:17 PM Subject: Re: [Elecraft] MD2 resistor mod - a different approach? > Tom and all, > > There is a solution to using a mic requiring the 5 volts (through a > resistor) and switching to a mic that does not need it which does NOT > require the resistor to be in the mic plug. > > Wire the resistor at the mic jack between pins 5 and 6 (pin 5 = FUNC which > is not used), then in the mic plug for the microphone(s) needing the 5 > volts, add a jumper from pin 5 to pin 1. The mic jack will have only AF on > pin 1, and will have +5 volts through the resistor on pin 5. > > When wired this way, your Elecraft mic will work on other K2s wired for the > standard Elecraft mic, but another standard Elecraft mic will not work on > your K2. > > Additional note - if NONE of your mics have the UP and DOWN buttons > implemented, you can use pins 3 and 4 for any purpose you wish - including > piping the +5 volts on one of these pins instead of pin 5. > > 73, > Don W3FPR > > > - Original Message - > > I want to be able to switch between my MD2 mic which needs DC applied to the > AF line and my Heil Proset Plus headset which doesn't. > > I'm not sure I could fit the resistor that comes with the MD2 inside the > female connector at the mic side so I'm looking into connecting pins 6 and 1 > together in the female mic connector and putting the resistor in SERIES > with the 5 VDC line going to pin 6 at the male end of the jack. > > When the MD2 is plugged in the AF line would get DC applied through the > dropping resistor in the 5 volt line. When I plug in the Proset Plus pin 1 > is just audio and no DC applied. > > Does anyone see a problem with doing it this way? I know you won't be able > to pull a lot from the 5 volt line after this mod but I don't plan on > powering anything else off of the mic connector.Also...I would not be > able to plug my mic into someone else's K2 as it would put the unlimited > 5VDC line directly to my mic element. I practice safe microphoning and > never insert my mic into any other K2 except my own so I'm not concerned in > either case. > > Comments? Suggestions? > > Tom K2TA > ___ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2 resistor mod - a different approach?
Tom and all, There is a solution to using a mic requiring the 5 volts (through a resistor) and switching to a mic that does not need it which does NOT require the resistor to be in the mic plug. Wire the resistor at the mic jack between pins 5 and 6 (pin 5 = FUNC which is not used), then in the mic plug for the microphone(s) needing the 5 volts, add a jumper from pin 5 to pin 1. The mic jack will have only AF on pin 1, and will have +5 volts through the resistor on pin 5. When wired this way, your Elecraft mic will work on other K2s wired for the standard Elecraft mic, but another standard Elecraft mic will not work on your K2. Additional note - if NONE of your mics have the UP and DOWN buttons implemented, you can use pins 3 and 4 for any purpose you wish - including piping the +5 volts on one of these pins instead of pin 5. 73, Don W3FPR - Original Message - I want to be able to switch between my MD2 mic which needs DC applied to the AF line and my Heil Proset Plus headset which doesn't. I'm not sure I could fit the resistor that comes with the MD2 inside the female connector at the mic side so I'm looking into connecting pins 6 and 1 together in the female mic connector and putting the resistor in SERIES with the 5 VDC line going to pin 6 at the male end of the jack. When the MD2 is plugged in the AF line would get DC applied through the dropping resistor in the 5 volt line. When I plug in the Proset Plus pin 1 is just audio and no DC applied. Does anyone see a problem with doing it this way? I know you won't be able to pull a lot from the 5 volt line after this mod but I don't plan on powering anything else off of the mic connector.Also...I would not be able to plug my mic into someone else's K2 as it would put the unlimited 5VDC line directly to my mic element. I practice safe microphoning and never insert my mic into any other K2 except my own so I'm not concerned in either case. Comments? Suggestions? Tom K2TA ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] MD2 Heil Desk Microphone for the K2
Thanks Ron, I changed R14 on the ssb board from 10K back to a 1K resistor. I don't know why I used a 10K resistor. R2 was the original. All seems fine. This is a real nice looking mike and the swing arm mike boom is really well made. It's sturdy, smooth and quiet. I'll get on the air (SSB) with a friend tomorrow night and try to get a signal report with the new mike. I've really become a cw nut lately, trying to get 100 countries on 30m. The K2 with the DSP board really works like a champ on that 30m noise. I have a Kenwood TS-2000 and it works like you know what compared to the K2. 73, Roger, W1EM -- It probably doesn't matter with the new mic, Roger, but if you want to put the K2 back the way it was, the resistor in question is R14 on the SSB board. The original value was 1k and it was common to replace it with a 5.6 k resistor to increase the audio level. Depending upon how long ago you made the change, you might check another resistor too on the SSB board: R2. The first iteration of this "mod" recommended swapping R2, which should be 5.2k, with R14, originally 1k. Reducing R2 from 5.2k to 1.0k also increased the gain, but it was noted that it was then possible to over-drive Balanced Modulator U5, creating unwanted distortion. So if you did the mod a long time ago, it's possible you swapped resistors. Check R2 and make sure it's 5.2k Ron AC7AC -Original Message- I just received the MD2 microphone and the PL2T Pro-Line microphone boom I ordered a few days ago. REALLY REALLY nice looking! And at about half price, what a deal. I have it set up. I had to install 8 jumper blocks onto the microphone header and a 5.6K resistor across pins 1-6 on the rear of the 8 pin mike connector (supplied with the mike). My problem/question is this. I had been using a regular Heil mike that had low gain for the K2 and a few years ago I read somewhere about changing a resistor to increase the gain. The change helped. I don't know which resistor it was! I'm not even sure which board it was on. I think a 10K resistor was involved somehow. Does anyone know which resistor it might have been and do I have to change it back to it's original value to have the new MD2 mike work optimally? Roger, W1EM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] MD2 Heil Desk Microphone for the K2
It probably doesn't matter with the new mic, Roger, but if you want to put the K2 back the way it was, the resistor in question is R14 on the SSB board. The original value was 1k and it was common to replace it with a 5.6 k resistor to increase the audio level. Depending upon how long ago you made the change, you might check another resistor too on the SSB board: R2. The first iteration of this "mod" recommended swapping R2, which should be 5.2k, with R14, originally 1k. Reducing R2 from 5.2k to 1.0k also increased the gain, but it was noted that it was then possible to over-drive Balanced Modulator U5, creating unwanted distortion. So if you did the mod a long time ago, it's possible you swapped resistors. Check R2 and make sure it's 5.2k Ron AC7AC -Original Message- I just received the MD2 microphone and the PL2T Pro-Line microphone boom I ordered a few days ago. REALLY REALLY nice looking! And at about half price, what a deal. I have it set up. I had to install 8 jumper blocks onto the microphone header and a 5.6K resistor across pins 1-6 on the rear of the 8 pin mike connector (supplied with the mike). My problem/question is this. I had been using a regular Heil mike that had low gain for the K2 and a few years ago I read somewhere about changing a resistor to increase the gain. The change helped. I don't know which resistor it was! I'm not even sure which board it was on. I think a 10K resistor was involved somehow. Does anyone know which resistor it might have been and do I have to change it back to it's original value to have the new MD2 mike work optimally? Roger, W1EM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] MD2 Heil Desk Microphone for the K2
On Mon, 2004-22-11 at 17:01 -0500, Roger Marrotte wrote: > is this. I had been using a regular Heil mike that had low gain for > the K2 and a few years ago I read somewhere about changing a resistor > to increase the gain. The change helped. I don't know which resistor > it was! I'm not even sure which board it was on. I think a 10K > resistor was involved somehow. That would be R14 on the bottom of the SSB board. Original value is 1K. > Does anyone know which resistor it might have been and do I have > to change it back to it's original value to have the new MD2 mike work > optimally I'm not sure, but I would change it back. -- 73, Brian VE7NGR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
