IC7300 A to Z #46 - Building an external keypad for transmit memories
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- เผยแพร่เมื่อ 9 ต.ค. 2024
- NOTICE: In July 2021 the channel name changed from HamCuredSmoke
To Ham Radio A2Z. All of the earlier videos (like this one) are still available.
In this video we're going to build an external keypad to access the transmit memories on the 7300. This will work for the voice, CW or RTTY transmit memories.
Below are the parts that I ordered to build the box (Note: These are affiliate links):
Pushbutton Switches: amzn.to/39XMqYV
Microphone plugs & jacks: amzn.to/39SrG4Q
Project Box: amzn.to/3wFOmPy
( I bought the 3.94" x 2.68" - you might want to go up one size to the 4.5" x 3.5")
Resistor assortment: amzn.to/3fV1SZx
(NOTE: This is way way way more than you need unless you're building up your project parts bins. However, it does include the values that you need and it was only $13 at the time I ordered it)
These are not affiliate links, but you should be able to get the resistors and most of the other parts at Mouser or Digi-Key:
www.digikey.com/
www.mouser.com/
Please check out the companion website for this channel at:
a-2-z.tech/
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I cannot beleive for the life of me why Icom is not selling this for $159. They ask $79 for a cable. But this is awsome. Thanks for getting it out there.
I did this for CW only memories on my IC7600 and worked fine as I'm 99% CW operator but I expect it would work for SSB and RTTY as built by you. I did notice the cct diag in the 7600 manual and decided to give it a try and then I stumbled over your video which gave me the necessary push to construct one. Many thanks.
John G3LNW
Excellent video. Nice quiet concise delivery which is easy on the ear and senses.
Great video, Made me feel like even I could build one.
Now I just need a IC-7300 ;-)
You are a great confidence builder and for that THANK YOU... 73
Tom, you make very impressive videos, I am a brand new owner of the 7300. You have a great way of speaking and explaining the message you’re intending to get across. I will probably watch every video you have on 7300. A very good ham friend told me about you. Thanks for what you do, hats off to you! And I will make this a project as I like doing kits as well.
Thank you very much for the kind words. I am glad you're finding the videos helpful.
@@HamRadioA2Z I ordered all the items needed from Amazon, I did go with the larger project box. I will let you know how it works!
What a terrific project.
The 1.40 firmware upgrade also allows for reassignment of Memory functions to front panel/Mic buttons.
Some hints:
-- it's better to use a chisel-type soldering iron to make such a work. Better heat transfer / control can be easily obtained.
-- Strain relief is very good to have, but some additional protection may be very useful (I often use two or three layers of shrink tubes and/or cable break protectors.
-- You can also add a dedicated PTT button by connecting pin 5 to pin 6.
-- Furthermore, an Up and a Down button can also be added (Up is a direct connection between pin 6 and pin 3, Down is similar to the other buttons shown in the video, but with a 470 ohm resistor).
All good suggestions
@@HamRadioA2ZTom, without question, your (short) videos are way the BEST instructional videos I've ever seen. Thank you very much, and all the best for X-mas! 73 de HA5CST
Thank you Tom as always
Thanks For this info this is a hidden gem.
Good stuff! I'm getting my supplies together now. 73, K8JLW
I've been meaning to do this myself, a very handy function.
As an extension I think incorporating a low level tone generator to modulate SSB at say 5 watts would be handy. If you are using a manual external Transmatch for example it gets tedious manually adjusting the power output and operating mode everytime you change bands. You could do this two ways, with a hardware generator or just edit a tone sound clip with Audacity for example to set the output sound level to produce the required power of RF.
Hi Rob. Thanks for your comment. If you're looking for a simple way to generate a carrier for a manual tuner, there are much easier ways than a low level tone generator. If you do some Google searches for "icom tuner plug" and similar you'll find a number of web sites. You can make a simple circuit with a momentary switch that connects to the external tuner connector on the back. It will generate a solid, low power carrier for tuning up an external tuner.
Here's one page from KC2WI: www.prnewell.com/kc2wi/Icom_tune_control/index.htm
Fair warning-- I haven't tried his circuit myself. So, no guarantees, but it looks correct from what I've read.
73, Tom
@@HamRadioA2Z Thanks for the tip. I'll take a look
Great stuff, thank you.
Great stuff, thanks for keeping the 7300 info going.
Good job.
Great project; great video!
If you short [MIC] pins 3 and pins 6 it means "Freq Up" and shorted through a 470-ohm it means "Freq Down". Just measure the pins on the mic with an ohmmeter while you push the freq up/dn buttons to verify. I wonder what other magical voltage divider values might exist in firmware. Its probably just an ADC reading the voltage and deciding what to do in firmware. Also, might be able to add LEDs from 8V->2.2kOhm -> [4:squelch] and also 8V->2.2 kOhm -> [5:PTT] to light up during PTT or when receive happens. Just stay below 10mA on the 8V line. Be careful not to ground the [5:PTT] line directly, it may trigger transmit like [3:ACC] does, but I've not tested.
Hi Tom,
I have a question, on pin 3 and 6, you say you added a wire. I am assuming that the that there are two wires in total on each pin, is that correct? If that is correct the original two wires that were there are still there. Thanks!
Ok I did answer my question, it is adding a wire to pin 3 and pin 6. I made a mistake of improperly counting and went to pin 2 instead of 3. I wasn't even in a hurry, just one of those things. It's working properly now and thanks again!
Hi. Sorry I didn’t get back to you sooner. I’m glad you got it figured out. I can’t tell you how many times I’ve miscounted pins on a connector when building or troubleshooting something. 😁
I don't suppose you know if it's possible to externalize the counter key - to reduce the counter?
Not one to stop at four buttons..... While you are bringing all the wires out why not also add.......
1. UP/DOWN frequency buttons
2. Transmit button
3. Jack for foot switch
4. Jack for external mic.
There is actually a company that makes just such a beast for a decent price.
Tom
Those are great suggestions. I thought about adding some other features, but decided to keep it simple to start. Maybe a future project...
Que empresa es? ya que ando buscando algo que ya esté fabricado, por que en electrónica ando nulo. Gracias!
What company is it? Since I am looking for something that is already manufactured, because in electronics I am null. Thanks!
@@josemanuelurena8287 - The company is Sotabeams. Actually I was collecting the parts to build and then saw a used one at a swap meet. But I just can’t help myself so will probably modify it, just a little more!
@@HamRadioA2Z Do you (or anyone) have a schematic for how to wire in those additional features?
Can you still use a straight key plugged into the radio while using the memory switch box to send CW as you described in the video?
Yes you can. You just need to set the key type to straight key instead of paddle. The CW memories are not tied to whether you use the internal keyer or a straight key.
Nice Tom thanks for the great idea and project, BTW I like your videos, 73 Ed WD8JVV
Can you only do 4 memories with the external switch, because the on memories show 6 or 8, could you do all of those or does the wiring limit it?
Yes. The 7300 only supports switches through the mic connector for the first 4 memories. The Up Down buttons on the mic also go through that same pin. So it is actually supporting 6 switches. I believe the IC-7610 uses a separate pin for this function and it does support selecting all 8 memories with external switches.
@@HamRadioA2Z i had thought about using an elgato stream deck and see how or what memories I could control with that as well
Making one for the 705 as well? :-)
Maybe...
Can you tell me the name of the mic connectors or where I can buy them?
Hi Alan. You will find a link in the video description. I’ve seen them referred to in several ways - 8 pin mic connector, 8 pin CB connector and 8 pin DIN connector. Although, I believe they are not technically a DIN connector. I’ve also seen them called “8 pin DIN style connector”. Here is the link to find them on Amazon: amzn.to/39SrG4Q. Full disclosure- this is an affiliate link. It doesn’t change your price, but I get a small commission if you buy something.
@@HamRadioA2Z Thank You
somehow this seems cheating....but if waiting in a CW pile up for the attention of the DX station, its handy to just touch one switch to send the call. Plus, my parts bin is huge. KC1CCG
I actually use mine mostly for Field Day and SSB contests to save my voice.