Hey Michael. Thanks for the video. Im trying to get my hi band board to work, and you got me going in the right direction. Im 35.1 miles @ 284° from you. (Aprs) Think I'll try the aspirin trick.73 John
Buddy thank you a million for uploading this vid, I just got one and couldn't find a whole lot about em. Appreciate you good buddy de N1RIP 73! Liked and subbed!
Going through my junk box and found mine from 1994-1278B DSP; cables, manual, and all…except the software. I ran Amtor, RTTY, and Pactor with it. Loved it. Over the last year, I’ve gotten into APRS and now WinLink. Reckon the old box is still useable? I run either a Kenwood TMV71A or TMD710A. Whaddaya think? DE Scobie, AC4GM.
I just fixed one of these myself but mine was in worse shape than yours but funny enough the Vernier pot was also stuck on mine but it was not that hard to get lose again. my 6BQ7 was cracked too and I had no replacement so I had to figure out a suitable substitute for it, all sockets were bad and a ton of resistors had drifted way past value, case had impact damage etc. I managed to find some decent schematics but in the end I just used common sense and did the work without them and it works pretty much perfect now
I have the MFJ 1278 B DSP but i don't understand how Connect the microphone jack to the decametric set. There is a wire with a 3.5mm jack plug coming out of the mic jack. Where will this plug plug be plugged in? Behind the TRX or behind the MFJ?
hey thanks for this video! it helped a ton in figuring out how to go about restoring my IO-17, as you said, you couldn't find a manual; neither could i! closest i got was one in German. anywho thanks again!
I just had an incredible find. This exact radio in the green color. Brand new in box ! Bought it for 10.00 ....what a steal ! You never see these brand new . It's probably worth at least 200.00 I'd guess.
I usually burn the coating off with the soldering iron. When the wire is too thick I use a carpet knife. Mine ran on rx right away. However, the swr was huge. After much fiddling with the swr cores I finally found out that my load was not 50 Ohms and the bad swr was correct. The pcb material is excellent. What surprised me most was the harmonic suppression. On 80m about -48dB and then from band to band lower down to -55dB on 20m, my highest band in this rig. Thanks for your video!
My husband just bought one of these for me at an online auction! So cool to see that it can be fixed up if need be. We pick it up tomorrow-can't wait! Thank you for your videos!❤📻🎙🎚🎛
Yes firmware is free, no password needed. If someone set a password you will need to get up with them. You can also flash via RS-232 if needed. You will need to contact Amiko for proper files. Unless someone is trying to use this to hack with, you will have no issues.
Top job on this & I thank you. Yes, Mr. Carlson has a lot to answer for! I saw his resto & just had to rush out in a buying frenzy... I secured the same model (same livery too) which was in excellent condition apart for a red jewel pilot lite someone fitted on the top LHS. I kinda get why they did it but it sort-of wrecks the layout balance. At least they used a proper Heathkit jewel. I also carried out the Carlson mod for the volume control.... still wondering how the designer overlooked this. Thanx again & merry Christmas:)
@ke4est Sound reasonable. Good advice. Thank you. I just received my "Classic" kit today. Messed up my order and only purchased half the kit! 😄. Looking forward to burning some rosin. 73 de KF4LBG
I found one of those at a garage sale for $10, completely made my day. Just a really nice reasonably compact piece of gear. Mine was little hinky at first, but I replaced the .1 uf bumblebee caps and it came right to life. The only shortcoming of this piece is the lack of a bias supply, but I made one on a small chassis using a backwards filament transformer running off the 12.6 volt heater supply with an 0A2 gas reg tube crammed in there and it works great. I haven't replaced the electrolytics yet, but if I do, I will do exactly what you did with the PC-mount e-caps on some terminal strips or a parts board, $10 worth of caps and back in business.
Turns out that this IM-102 is Heathkit's copy of the Weston model 1240 DMM; both companies were under the same ownership at the time. The 1240 also uses the same round heatsink.
Years ago, I bought my 1st PSU - Elenco XP-625. New to electronics, I tried it on several devices as a PSU. It has killed EVERYTHING I have ever connected to it! :D 7yrs later, I'm thinking of ripping it apart to see if it was simply defective (DOA). Thx for your vid. Beware of these unfiltered/unregulated "magic smokers". Recently, I connected a ZK-4KX DC Buck Boost Converter Module to it to act as a controller, and after about 30secs, drawing no current, it blew a 470uF 35v electrolytic cap in the Converter! So, I've named it "Killer". Thx for your vid.
Great video. The HP the made this instrument was a great brand. It's sad that HP now only makes plastic disposable printers that suck you into their ink scam.
@ke4est , BTW, in your explorations while repairing this meter, did you find any datasets for the "TOA8709" op-amp (IC2 & IC19)? I have not found anything about this chip online, other than one brief mention on a German website that compares micro-photography of different old ICs; apparently they conclude that the chip is basically the same as a uA709......
Yes, all I can figure it was the cold solder joints. No idea why someone was in there in the past, but you could tell had been in there. Perhaps some one in the past had it hooked up to something else and abused it a little.
Do you have a source for those 443-92 (aka MC9860P) BCD-to-decimal driver ICs? I need a couple to fix mine and I can't find them for sale anywhere, not even ebay.
I sure don't. That is what I do for obsolete parts like this. I search ebay all the time hoping some one will have some, or a trashed meter. Like a meter that has got physical outside damage, but a lot the times the chips inside are still good. Just take all the standard precautions while removing them.
Michael, good evening, I enjoyed your video. I recently acquired one of these devices, it is in good condition, like yours. As soon as I get it working I'll let you know. I like maintenance of transistor devices, especially old radios. I'm from BRAZIL, city of Belo Horizonte. Where are you from? A hug! 😀
@@ke4est Michael, good night. My generator started working again, after changing 2 capacitors that were altered, defective. I replaced the rf output connector for a p10 jack. I didn't find the original. Served very well! Good videos for you, that your channel can help many technicians. 😀
Hi! Just a quick tip that does not involve scraping: Take one aspirin pill (Aspirin, also known as acetylsalicylic acid) and put the copper wire on top of it; then hit it with the solder iron tip; The tip of the iron must be saturated with solder and flux; the heat will melt the aspirin pill surface and that in turn will dissolve the enamel and in the same time will wet the copper wire with solder. Some fumes will be created and you really really really don't want to breath those toxic fumes. For thicker copper wire you can also try folded sandpaper cause you do two sides at once, but thinner than 0.2 mm , do the aspirin tablet.
I really enjoyed this. I have an APRS node that has been running since 1997. I changed radios once about 15 + years ago. I monitor it on the APRS network. It’s off the mountain temporarily, but still running. None of my new computers have 9 pin serial connections, just usb. How do you run these on the newer computers? Mine won’t even run the old DOS / Win 3.1 terminal software. Yeah, I want to get this back up for an APRS Thursday net check in, maybe work the ISS packet station. Let me know what you’re setup is. Great memories! Thanks for the video. Been on packet 100% since 1994. We’ve probably worked each other. Bob, KS4NG
I have a computer with 9 pin. Asus still makes mother boards with them. In my other computer I bought a PCI card for serial. First two solutions work the best. But they do make a USB to serial adapter. Some work well others not so much. There are a few terminal programs out there that work on Windows 10/11. You can also use Putty.
