This is truly is a new product. I know the majority of echo users are out to annoy the world, but digital echo can be an enhancement rather than a detraction. After all, digital delay, echo, reverb and slapback echo are used in the recording industry as well as in surround sound reproduction.
The first thing I spotted was the pink label on the outside of the box. I thought it was only an unrelated promotional gimmick. After noticing a phone jack on the rear panel of the mic next to a small shaft labeled EAR, I checked the instruction sheet to confirm that the jack is for monitoring yourself with headphones.
No need for talkback here. Talkback is almost useless with a desk mic anyway. Most operators want to talk a foot or two from the mic and to do that the mic must be tuned up to be more sensitive causing feedback when talkback is used. Complete documentation is included.
It covers maintenance including cleaning the windscreen, features, controls and their settings, specifications, dimensions and even a schematic. A word spoken into the mic will repeat and decrease in volume until it fades away.
The delay time between each echo is set with the Digital Delay control from a short reverb to a long repeat echo of close to one second. You could easily speak five quick words before the echo repeats itself. Slapback Echo: Slapback echo works exactly as Echo but only repeats once. A short delay adds fullness to your voice, almost like two people speaking at the same time.
A touch of this effect does make your audio sound full on sideband. One is a single tone and the other is a multiple tone three different quick tones. The tones are generated digitally and are easy on the ears, or should I say nerves.
Headphone Jack: This will drive a walkman type stereo headphone set or an amplified speaker. It has a high quality output and comes from the same amplifier stage that is feed into the radio. Mic Gain: The Mic Gain is a slide control that sets the level into the digital circuitry. This meter is quite accurate. The setting of this control will vary depending on how far away from the mic you speak.
Setting the control to the center position turns off the echo effects. Turning the control counterclockwise activates the Echo effect and sets the echo delay time. Turning the control clockwise activates the Slapback echo effect and sets the Slapback echo delay time. In either case, turning the control towards MAX increases the delay time. Setting this control completely counterclockwise will act the same as turning off the effects. With this control set completely clockwise, the volume of Slapback and Echo repeat will be at maximum and sound as loud as the original sound picked up by the mic.
At MAX the echo the mic tested repeated approximately 10 times. Around nine seconds. Single is in the out position.QRZ Forums. I would like to wire a D Night Eagle to my m. I have the crimping tool to do the modular plug. Can someone help me. Thanks Please email me at jrice25 cinci.
Wiring a D104
What are the impedances of the m and the D you have? I think there's more than just wiring to this situation. N4AUDMar 12, Never even thought about that! I will check and let you know. Thanks Ernie. The impedance differences are different with a lot of the new ham rigs out there now. I would like to find out a way to wire up my D silver eagle to my Icom but i have been told that theres a special way to do it because of voltage differences.
The majority of new radios out today, solid state variety usually have ohm input Z.
Tube rigs ran 50K or over. If the D has an internal amp, it could run new radios ok since the Z tends to be lower. Icoms have 8V on a wire for the mic preamp in their SM's and such.
Download D104 Not Amplified Wiring Diagram PDF
You do not want to short this 8V line out, as you will kill the internal regulator. Bill, W0LPQ. W0LPQMar 12, W9GBMar 12, In other words, it's gonna sound like poo-poo. N3ATSMar 12, ATS: Not necessarily! You need to make sure that the output from the microphone is DC isolated from the input if there is a voltage present on the audio line.
This can be accomplished quite handily by putting a fixed capacitor of around 0.
You do have to adjust the level from the preamplifier to make sure that you do not over drive the input audio circuits to the rig. This is definitely not a difficult task to accomplish.The 77 head dates back as far as for an authentic vintage look.
I have one of these with a bad element, and may fix it, just for its vintage look. It predates the iconic "Elvis Mike" the Shure 55, and is similar in looks. Introduced aroundit was a favorite with harmonica players. I have one of these with a bad element, and will have to see if it fits a replacement element described below.How to read an electrical diagram Lesson #1
Try to find one of the other styles for any element mods. The combination of an authentic D original and the K7DYY processor will give you a lot of punch and great sounding audio, without the complication and expense of a rack full of gear. If you do not have a good D head, you are not out of luck. The K7DYY processor has all you need to use an electret element, such as a bias supply.
They just released the 5. My thinking is that the electret mike element sounded too bassy without a smaller coupling capacitor to get rid of the boominess. I believe it will be worth the extra money to get the Heil expertise in audio in my radio systems. The original HC-5 element was rectangular, and possibly had different characteristics from the new HC I tried it, and still prefer the original D cartridge, due to not as much presence rise.
Turner +3 Desk CB Radio Microphone Review
A circuit to provide that might be included in the D base. There is a lot of other useful information there. It includes the battery connector and a level control, so it is the most desirable for this modification. Click on either image to enlarge it. Click again to get a really magnified view. Note that the black version with the horizontal actuator on the base rather than the side will NOT work because the board will not fit. This board contains three essential features to get good performance from the D classic crystal mike element sometimes referred to as a "lollypop" mike.
The first feature is a high impedance load to get the full audio spectrum response from the D crystal element. This consists of a 6. The second feature is a Integrated Circuit which serves as a hard limiter to prevent overmodulation as well as a compressor function to provide more audio punch.
There is also a downward expander or noise gate. The improved Mark 2 boards have a jumper to turn off the noise gate function, which most AM operators prefer not to use. You may want to try the downward expander if you use this with a vintage SSB rig.
I use the older boards which did not have this jumper on my vintage SSB gear, because it reduces background noise like fans on my "active antenna couplers" between phrases. This full legal limit transmitter requires a low impedance source provided by the transistor.Some power mics leave the amplifier circuit connected to the radio audio pin.
This is all right for most radios, the more expensive type in particular. Most CB and Ham rigs share amplifier circuits. This saves space and reduces cost. This can be eliminated by adding a large value resistor say 47K Ohm to KOhm but the audio will be about the level of a stock mic. The only way to fix this problem is to put another set of contacts in to switch the audio lead. If you have a scrap mic you might rig something up. Have you ever had trouble with wiring a stock mic?
What could go wrong? Many new radios have the same connectors and wiring but some mics will work on all radios and others only work on some. The mics are wired the same, but the mic elements are different. The mic from the 76 has a dynamic cartridge, the type used in stock mics for many years.
The mic from the has a electret condenser cartridge, less expensive and has a small preamp built in, thus eliminating one preamp stage in the radio. Usually the hand held mics are imprinted on the back cover, if they are electret condenser. This type mic requires a DC supply voltage to work and these radios are designed for them. They are usually the cheapest cartridge the manufacturer can get their hands on and the sound quality is usually muffled. If you have a radio that has an electret condenser mic, the best replacement is a good quality power mic such as an Astatic D, DM6 or a M6.
Another type of mic is the non-amplified crystal or ceramic type. These are Hi impedance mics and will only work on the older tube type radios like the Browning Eagles, Tram D and others.
These radios are Lo-Z and are around Ohms. Power mics with Hi-Z cartridges have a preamp that will match both types of radios. There are many things that can go wrong with a mic.
Most common is a break in the coiled mic cord. This can be at either end and usually intermittent, causing transmit or receive breakup.
First you will need some way to monitor your results, a mic test box or a radio with another to monitor with, an Ohm meter, or a test light. The mic test box or the radio with a monitor radio nearby would be the best.
To determine which end it is, hold one end secure while wiggling and bending the cord at the other end.QRZ Forums. Has anyone here attemtped such a radical rebuild? I know that the Icoms have that powered pin I need to take care of, I know that I need to take care of the LowZ to HighZ, after thinking about this, why couldn't I just take the cuircit board and mike cord, resolder all the connections, put that elect-mike in the D head with modifications, etc? Anyone see any issues that I have missed?
NV8PDec 31, There might be some frequency response problems with a hand mic element in a desk mic body. But I can't see where it would hurt to try it. Whatever floats your boat- - - go for it!
AG3YDec 31, I've got a D with a Heil element in it. Works fine. N4AUDJan 1, I, too, have an older D that had a bad crystal element which was replaced with a Heil element. This was before Heil created a retrofit kit for their elements for the D, though. One thing I found was that the active preamp needed to be bypassed with the Heil given its lower output impedance. The old crystal elements definitely need it to drive today's typical rig. As mentioned, the cavity of the D head unit, the element you choose to use and the way that it is mounted will affect the sound quality and frequency range you ultimately get from the retrofit.
Hope that helps and good luck preserving those old mics for another generation! Cheers and 73s, David. W9GBJan 1, Steve 'WIK has used them and recommends them. I may be wrong, but I definitely recommend them! The Mouser part number is 25LM Glen, K9STH. K9STHJan 2, Clearly, there are issues I have missed!!!Download Manual. Mic wiring diagram:. Is your Clarifier locked out?
Transmitting using this radio requires an Amateur Radio License. Licensing information can be obtained by visiting www. Tune-up and frequency conversion. Choose if you want Channel Up and Down buttons installed in the microphone. Make a completion video to show tune-up levels and modifications. Controls and indicators. Radios requiring technical services may be delayed 3 to 10 days. The item most overlooked when ordering a custom radio is the microphone.
CAT Enterprises. Back light colors:. Here is instructions to put it back usually to RT. Comply with part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference.
Radios requiring technical services may be delayed 3 to 10 days The item most overlooked when ordering a custom radio is the microphone. Tech Library. CB Repair. Click for larger image. Click for larger images.
Turner RK Noise Canceling microphone. Astatic L Noise Canceling microphone. Astatic DM6b Amplified microphone. With buttons?
Astatic RDE Amplified microphone. Add a Small External Speaker plugs into back of the radio for improved sound.
Add a Large External Speaker plugs into back of the radio for improved sound. Your Gmail.In the CB radio hobby there are certain products that over the years have become legendary. It has a PTT Push-to-talk bar located near the front, a volume gain control on the left hand side, and a slide lock on the right side if you want to have an extended key down. The microphone cord leaves the back of the unit in the middle and has a nice rubber shield added right near the base for additional protection.
When you flip over the microphone you find the battery compartment and the switch for either electronic or relay switching radios. The battery compartment is simple and very basic with the actual battery being exposed and a flexible metal strip holding it snugly in place. The microphone uses a 9V battery to power the amplification circuit. When you press down on the black push-to-talk bar at the front of the radio it in turn pushes down on a leaf switch system. This system has been criticized on occasion, but as many of these microphones are still operating perfectly close to 40 years after their introduction it really shows the quality of workmanship in this American made product.
My particular microphone ended up having an issue later in life when it would only key when I pressed on one side of the button and not the other. I opened up the microphone to find that the metal leafs had become slightly distorted over the years and it was just enough to cause some problems. I very crudely got in there with some needle nose pliers and bent them slightly and five minutes later it was working again.
The main circuit board is located on one side of the microphone base and is held in place by three screws. It reproduces the human voice with amazing clarity and gives very loud modulation. This microphone is the ultimate when it comes to matching up with your transceiver.
I could give you numerous claims of my own on how well this thing works — but why not check out the reviews on eHam a popular Ham radio site to really see what people think of this microphone.
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