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N4AUD
10-31-2006, 09:28 PM
I found a Heil HC-3 element in my junk box and can't find any information on it. Does anyone have any specs on it or if nothing else just the impedance? I would like to put it to use.

G0GQK
10-31-2006, 10:04 PM
You just connect the two wires as on any other microphone and then you............speak.But its no good on an Icom.

G0GQK

N4AUD
10-31-2006, 10:11 PM
Quote[/b] (G0GQK @ Oct. 31 2006,18:04)]You just connect the two wires as on any other microphone and then you............speak.But its no good on an Icom.

G0GQK
Different rigs have different impedances. I need to know what the impedance is for this element.

WA9SVD
10-31-2006, 10:32 PM
Why not e-mail Bob Heil at Heil Sound and ask him? He usually responde quickly, and can give you more accurate information than you need...

N4AUD
10-31-2006, 10:34 PM
Thanks anyway, I have found out that apparently all Heil elements are low impedance and require a transformer for high impedance rigs. Now I have to decide what type of mic body to use.

N4AUD
10-31-2006, 10:35 PM
Quote[/b] (wa9svd @ Oct. 31 2006,18:32)]Why not e-mail Bob Heil at Heil Sound and ask him? He usually responde quickly, and can give you more accurate information than you need...
Good suggestion! I'll do that.

W9GB
11-01-2006, 01:05 AM
Actually, that would be a good repalcement element for any dead microphone. #Tons of bad microphones around -- just find a hand or desk microphone style (or era) that you like. #A Turner 99 or U9S ... or an Astatic D-104 .

Bob does have a "retrofit" page for his HC-4 / HC-5 elements that provides useful advice for element mounting (baffles) in different microphones.

w9gb

N4AUD
11-01-2006, 01:12 AM
I'm thinking a D-104 body for it, I've got one I can use and I like the way they look. When non-hams look at the shack, they always notice the old chrome lollipop.

AG3Y
11-01-2006, 01:24 AM
I fail to see why the "Chicken Choker" has such a mistique and is such a popular design!

If I were going to have a special microphone for my shack, I would love to have one of those old "bedspring" microphones. You know the type, you have seen them in ooolldddd pictures, where the metal ring holds the element in the center with a bunch of springs attached to the element and around the ring at various places.

Of course the suspension was designed to shock-mount the element.

Actually, for microphones, I would LOVE to have one of the RCA ribbon styles, again they show up in many famous pictures of radio broadcasts.

I used to work with the 77DX and the Jr. Ribbon, and they were very fine microphones.

We must remember that HF communications IS NOT and SHOULD NEVER be considered equivalent to broadcasting, and the microphones that are so suited to the one would probably be very wrong for the other.

But wouldn't it be fun to have a really good communications element stuck inside one of those old cases ?

73, Jim

N4AUD
11-01-2006, 01:51 AM
I'd love to have an RCA ribbon mic too, but they are way out of my spending limit. I've looked at some of the copies that used dual crystals, but they are getting more expensive all the time, just like the Shure 55s. I like the "bedspring" type also. Come to think of it, I like a lot of old stuff, things used to be made with individual style.
I can't tell you why I find the D104 appealing, but I do.

W9GB
11-01-2006, 03:22 AM
Quote[/b] ]Actually, for microphones, I would LOVE to have one of the RCA ribbon styles, again they show up in many famous pictures of radio broadcasts.
Yes, that is the RCA 77-DX.
http://enakmic.com/

WB9UOE had the first circa 1940s ones --that I saw close-up. #I always wish he would either have them restored or sell. RCA Ribbon mics are now collectors pieces and sell for thousands of dollars.
http://www.thuntek.net/~bk11/bk11.htm

Thanks to Larry King, Johnny Carson and other broadcasters -- the replica parts are being produced -- largely for reproductions (not cheap either) - the parts can also be used for replacing worn parts on the genuine articles!
http://www.wesdooley.com/aea/AEA_Replica_Microphones_and_Parts.html

http://www.bigdmc.com/44bxjs.html

http://www.thuntek.net/~bk11/bk11.htm

Here is a California reseller - warning - people not use to high priced antique microphones - should not view!
http://www.vintagephone.com/EWMics3.htm

Here is W9AD's actual microphone (restored) - why spend money on the radio
http://www.coutant.org/antler/index.html

I like his Neumann M147 (great eBay buy and repair)
http://www.w9ad.com/microphone.htm

w9gb

N4AUD
11-01-2006, 04:03 PM
Installed the element into the D104 body, checked into ECARS and got a good audio report from WB3GVD.

Looked at the RCA restoration sites and drooled, but the prices are a bit out of my budget.

W9GB
11-01-2006, 07:48 PM
Great, sounds like that HC-3 element will do well.

Heil Sound - D104 retrofit diagram for HC-4 / HC-5 (should be same for your HC-3)
http://www.heilsound.com/amateur/radioconnections.htm

D-104 ASTATIC
The D 104 does not need a baffle board as the internal metal back plate IS a baffle board. Simply cement the HEIL element right to that. It is usually best to cement a very thin piece of foam between the two to eliminate any vibrations that may carry through to the element.

As with all of the microphone installations, it is also best to place a THIN - acoustically transparent piece of foam in front of the element which serves as a windscreen 'breath blast' filter. Most microphones will already have some type of filter in them.

The RCA's are quite beautiful --

Heil's Classic Pro uses the RCA reproduction parts and uses a shock mounted dynamic element (and not the original ribbon element). #
http://www.heilsound.com/amateur/classic_pro.htm

There is a restoration firm that will install new ribbon element in these reproductions -- but that would be an expensive upgrade ! -- Maybe I should ask Bob (if I hear him on 40 meters agaain) if he has one stashed away in his personal microphone collection?

w9gb

Some amateurs are fond telegraph key collectors - and others are fond microphone collectors. #BUT, RTTY lovers need a large room for their Model 15, 19 and 28 collection!!

AG3Y
11-01-2006, 09:31 PM
"Some amateurs are fond telegraph key collectors - and others are fond microphone collectors. BUT, RTTY lovers need a large room for their Model 15, 19 and 28 collection!! "

Ya better believe it ! ! ! 2 model 15s and 1 model 28, not to mention a couple of model 14 tape readers and a tape puncher!

In the past I had some bigger machines, including ( I think it was ) a model 36 that was capable of the full upper and lower case ASCII character set. You should have seen the typebox on that. It was over twice the size of the model 28's ! The machine was built into a desk and had a "computer" where the drawers would have gone in a conventional desk. A monster, but beautiful to watch in action. I gave it to a close friend who used to work on TTY equipment in his earlier days with AT&T. I don't know if he kept it when he moved or not. It would be a museum piece today!

(Heavy sigh) Mics and keys are definately easier to keep ! 73, Jim

W0LPQ
11-01-2006, 09:49 PM
AUD I heard you on 55 this morning. Sounded ok here also.

Bill, W0LPQ

N4AUD
11-01-2006, 09:56 PM
Quote[/b] (W0LPQ @ Nov. 01 2006,17:49)]AUD I heard you on 55 this morning. Sounded ok here also.

Bill, W0LPQ
Thanks. I guess it was a good find in my "junk" and I appreciate the signal report.
I put foam behind the element and there is a black cloth already behind the mesh screen, so while I'm sure Bob Heil's kit is top notch, I am a cheapskate. That's why I have a well stocked junk box. http://www.qrz.com/iB_html/non-cgi/emoticons/smile.gif

N9VO
11-01-2006, 09:56 PM
Quote[/b] (W0LPQ @ Nov. 01 2006,14:49)]AUD I heard you on 55 this morning. #Sounded ok here also.

Bill, W0LPQ
Whadda ya doin checkin in on ECARS instead of MIDCARS where you belong Bill?http://www.qrz.com/iB_html/non-cgi/emoticons/rock.gif
http://www.qrz.com/iB_html/non-cgi/emoticons/biggrin.gif

W0LPQ
11-01-2006, 10:01 PM
Jim I was just listening for the heck of it. Seldom listen to 58 anymore. Many reasons. After that I went up to 17 for a while.

Bill, W0LPQ