Yaesu FT 857-D Mic interface
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- เผยแพร่เมื่อ 9 ก.พ. 2025
- I wanted to use a ceramic cartridge mic on a Yaesu ft 857 so I tried the standard rj45 to 4 pin adapter first. You cannot use the scan functions with this so I made an interface from a diecast aluminium box with switches on it. The onboard led runs off the +5V signal from the radio and the rj45 and the push buttons are all wired parallel to the original radio. A big thankyou to Michael at Metal Finishings Ltd who anodised the box. Then I gave it a coating of clear laquer to give it a sheen.
The original dynamic mic has very low gain which just doesn't cut it on SSB
I also modded the Superstar 3900 as it had the awful blue digits and blue signal meter display. I changed the blue led in the meter for a warm white led which looks like a bulb and added a red tx led in the meter and changed the digits to red.
Link to Metal Finishings www.metalfinishingsltd.co.uk
I have a D104 on my FT-857D I get great reports on the Air. Great Setup
I upgraded to Astatic 636L with all the adapters to convert to 4 pin. It shuts off my Yaesu 857d when connected. Any ideas? Scotty W3SGT
Nicely done. Exactly what I have been looking for but unfortunately I don't time to fabricate.
separate the head from the body. you can then use the short lead direct into the radio body. put the radio somewhere out of site and you will reduce the fan noise you are subjected to.
Achieved the same as you but I got Knights to make an adaptor for my Teardrop (from CB days a lifetime ago) and it drives the little radio quite well. Mine fits the radio's own socket no problem so I don't need the adaptor box like you've used. The Teardrop *much* better on my TS50 however. To get around the 857d's rubbish standard mike thing I also bought an MH59 DTMF accessory mike with most of the functions available on the keypad. It gives much better sideband audio than the MH31 and is sharper by far. Drives it quite well on ssb. A problem with both this radio and the 897 is the ALC's action which makes it very hard to drive these radios adequately. You end up with thin sounding audio that can't be improved much, unfortunately. I think the adaptor rat-tail from Knights was less than a tenner.
Did you find that when the RJ45 connector comes out of the radio it is reversed at the other end? I am doing something similar for my FT-857D to run a XLR mic but it seems that on the PCB end that Pin 8 On the RJ45 socket is pin 1 on the radio Socket. It very strainge and defenetly is not a fault with my PCB design.
To be honest I never noticed. There is a schematic available on the internet. I don't actually have the radio anymore so I can't check.
Brilliant idea 👌👏👏
ianevans67
Bonjour je voulais savoir combien vous vendez l' interface pour le FT857 MERCI
I don't have a dummy load. I always use the beacon channel six.
Nice
What about he difference in resistance between the stock mic and an astatic or other mics? I talked to yaesu and they said this sort of thing was a no no. These are graet radios except for the mic.
stanky98035 They would say that. There is no impedance mis match. Any mic will work with any radio. I've never had a problem in over 30 years.
O K I'm just worried about ruining my radio. It's my favorite
MFJ 949E is actually a great tuner.
American freedom Logistics but an antenna tuner does not change the actual SWR it just makes the meter lie to you and the gear that is in line the SWR stays the same.
Good job, mate. You didn't have impedance issues with connecting a ceramic to a dynamic mic load?
Radio test 27 555 usb - bravo :-(
Can I order one of those from you?
Sorry I don't have any radio gear anymore and I only made one of those. It's easy to do the info is on the internet
How did you get the FT857D to TX on 11 meter band?
W0QGS Richard Hi I thought all 857s had continuous tx from 100khz to 50 mhz with no gaps. mine does. Also tx from 136 to 174 continuous including marine and tx from 400 to 470 I thought they all did that.
W0QGS Richard I got it from Greece perhaps European spec is different maybe.
Yeah, that could be... Did you purchase new? If it was used someone could have done the MARS mod on it as another possibility.
I have the 857D and love it, but wish it was open to TX on 11 meters, etc. But heard there are some issues if you have the MARS mod done on some newer models. May look into it further.
W0QGS Richard Hi Richard it probably is the mars mod it was brand new from ebay. I live near London but the seller is in Greece. it took 22 hours to reach here amazing speed of delivery. They are a shop called 2 way radio express. All their stock is unlocked or extended range. Check them out. Great seller
the clectric mod is chaper easier and better 99cent cartridge and some small parts look up under ft 817 mic mod kg6mn
Thanks I am going to get the 857 not the 818
Tahl Fishman stay away from YAESU because they are all garbage.
get a Turner supersidekick on the 857d, you are talking serious "80;s AM/USB "Punch" as well as carrier on SSB but you would on FOXY MIke,,,,, Your prob a bit young to remember what they sounded like bud,but they made the Sadelta echo master sound like that Yaesu standard,,,, but far quieter
Both radios above are for sale on ebay if anyone wants them 👍🏻
just add electric to the mic gut the old dynamic one jg
electret
Attached document
Can i buy one from you ?
Kevin Kc7zoh
Hi Kevin I only ever made the one unit myself but it's easy to do. I filed the holes in the metal box. The wiring is freely available on the Internet
could you direct me to instructions. thank you for reply
I'll dig out the wiring diagram later and I'll email it if you like. I'm at work at the moment
+Kevin J Hi Kevin sorry for the delay. Do you have an email address that I can send you a link or my own sketches and schematics ?
ianevans67 Love the job you did on this mic adapter. I'd also like to buy one or the wiring diagram from you. JackSchwab@gmail.com, W6IFR
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YAESU 857D is by far the WORST HF radio I have ever owned or used.I would not accept another one for FREE if I must keep and use it.I hated it.I replaced it with an ICOM 7000 that blew it away with ease.That is in the USA what is called an Illegal Export CB Radio which drifts really badly on SSB.Two garbage radios in one video imagine that.
You replaced it with a radio that Icom quickly discontinued due to over heating problems. lol Smart move.