Another electronics repair video blog. Some on site, some at my shop.
The idea is to show the steps involved in trouble shooting electronics and how to get the job done in a reasonable amount of time and in a format that can be understood by even the novice but technical enough to keep the more advanced technician interested.
I have been an electronics technician for over 40 years now so I have a bit of experience in even the oldest of equipment, like the ones with tubes so these videos will cover a wide range of products from antiques to modern.
There will be updates frequently so stop back and see what is new.
Don't forget to subscribe so you will know when a new video is posted.
Thanks for watching.
Пікірлер
I just acquired two of these and I am having issues finding the schematics. Can you share where you found the schematics?
Email me at [email protected].
What battery did you replace it with? Also this is one of the best videos I've seen on this subject. Thank you.
I had a bag of 2032 holders so I used one of those. It won't last as long as the original but at least it is easily changeable. Thanks for the good words.
A very interesting and informative video. Thanks from Aus!
You're welcome mate.
Sharp Technician
I have worked on countless GE MASTR II transceivers and most units over 20 years of age I just make it a point to replace ALL of the tantalum capacitors in the exciter board and the audio board and on the 10 volt rail. Most often they will let out the magic smoke with a loud pop. If you have one on the 10 volt rail you will take out the IC board that regulates that voltage. This IC in unobtanium, you will need to cannibalize another radio to get that part. Same with the audio amplifier board, will destroy the audio amp IC. Bad thing is you need to replace a tantalum with a tantalum. They are expensive and one hopes they are not New Old Stock, you could wind up with a bad new replacement.
All good advice. Even I, who loves old stuff, believe it might be time to retire the those old remote trunk heaters though. Thanks for watching.
@@AERVBlog I use them for repeaters only in todays world. Receivers are sensitive and with that large preselctor on the front end you can eliminate a lot of intermod. Yes crystal filters were still available to convert the receiver to narrow bandwidth last I checked but rocks for the elements are very hard to find since ICM closed shop a few years ago.
@@Subgunman Yeah, Bomar is all that is left and they have a minimum of $100. There is a place in the UK that does them too but more expensive. There should be a way to sub in a modern crystal oscillator but I haven't seen a way to do it yet.
Are there any alternative pa output tubes for the FT101E ?
Not that I am aware of. Sorry.
Recycle bin.
Lol. Probably should have but I found a PA board on line. All works now.
I bought this exact model about one and a half years ago but didn't get around to trying it out until recently. It would not turn on when I "long pressed" the power button. I hooked up the charger and the screen came on but said "low battery" and the battery icon showed it was full with no indication of it charging, contradictions that indicated some type of problem. I took the front and back plates off of the welder and figured out how to remove the board, (It has small aluminum bars that slide out to remove it but are pretty easy to push out, That plastic goop shown in this video only keeps you from sliding the board out that way, it isn't holding the board in place. Inside was a battery pack that I checked and had only 2 volts present. I thought I might as well try a battery pack hack and hooked an alligator clip to the positive terminal of the battery pack and another to the negative terminal. Then I got a battery I had that had about 4 volts showing on it and touched the other ends of my leads from the battery pack to the ends of the battery for about 5 seconds. I checked the voltage on the battery pack and it was up to 3 volts. My single battery was still at 4 volts so I repeated the process and then hooked up the charger to the pack. The pack began to charge correctly. It took awhile to charge but when it was full, I put it all back together, (forgot how the aluminum bars went in, so that doubled the time). Afterwards, it worked great, just like the above video shows.
Don't you just love it when you have to fix new stuff? Very good job thinking it through.
hello can you give me the software by internet link thank you
I think it is here en.feeltech.net/index.php?case=archive&act=list&catid=6
@@AERVBlog thanks you
By long plug in wires I mean the ones you said be very careful with when pulling them out. I hold the socket and use needle nose pliers to pull them and plug them back in after I ohm them. My transceiver came with one smashed.
The way they routed all those wires all over the place makes it so hard to get it back together without smashing at least one. Pay special attention to the wire bundle going into the PA. Thanks for watching. Good luck.
I learned a lot from this video. I have one of these transceivers good receive but no transmit, acts like a short when I press the mic. I have one of the long plug in wires that is smashed in but it ohms good so believe it is ok. My turn to check mine like you did here. I suspect a bad diode or power transistor. Thanks for the video.
I counted the squares on the cutting mat and guessed the dimensions of the tinfoil strips, it's roughly 3 x 25 cm, so an area of 75 cm squared. Didn't expected 2 nF of capacitance at all, quite surprised! Thanks for the video, really informative: I appreciated that you showed both the entire building process and you took the time to make all sorts of measurement, the most interesting to me being capacity since I would like to assemble my own for fun and exploration and I wanted a ballpark figure to know what I should expect out of it
Cool. Have fun an keep us informed .
I had this when I was teenager
Didn't almost everybody? The fact that some of them are still working is amazing to me.
Now, I’m looking for one to keep it forever
Nice video, thanks!
Thanks and welcome.
This is the BEST Fluke 8012A video online! Thank you. Now I know how to get measurements off mine. It’s actually much better at milliohm readings than both my other fluke meters. My 6.5 digit meter is on par with the 1980s fluke that I bought for 49.00. 😂😂 Now I will figure out how to install a backlight. Shouldn’t be too hard. Thanks for the video.
Glad it helped! It is a good meter. Let us know about the backlight.
@@AERVBlogwill do. Might check with some China lcd factories about required quantity for a pin to pin exact lcd with backlight. If it’s not too crazy might buy them and sell the rest on flea bay.
Dr Carlsons lab STAT!
Lol. I thought of that. Finally just bought a used board. It works now.
@@AERVBlog oh thats great news!! what do you think about the old IC 7200?
My 757 rotating dial wheel is jammed, the frequency is locked even when I can get it to rotate with difficulty, and nothing seems to loosen it. I've had it apart inside and out, but find no solution...any ideas?
You would be amazed at how locked up the tuning shaft can get from dried grease and dust. Make sure that is turning. There are a few videos on youtube about it.
@@AERVBlog Thanks for the response, and I've tried to get the whole dialing unit out, but find no way to do so due to my inability technologically. I'm 87, have unskilled fingers, and I can't find somebody to do the repair. Also, the cost in today's economy makes it more reasonable to throw the rig away and buy another used one. I like dials and buttons, not menus. When you've been in love with the old equipment for years and can't keep up with the new technology, you don't have much choice.
sorry for the rant. I'm just so frustrated.
Help please! Both of my HS824 speakers have been serviced before because when they are turned on they had a shortage and fluctuated in volume. I had to quickly switch the low frequency settings back and forth to get each the sounds to jump to the correct volumes set. The speaker volumes constantly cut as if the speakers have some type of shortage.
If they work a all it is a sign that something mechanical is wrong. In your case I would guess that the 4 switches on the back need cleaned. Not a hard job just get a good cleaner like Deoxit 5. Use just a little, don't make them swim in it. Spray and exercise them. You will have to take the amp out of the box but it is easy.
I have swapped the resistors and now there is too low audio at output.
All I can say is check the rest of the parts. Don't trust them to do anything right. Good luck.
This video could be informative but I can see it only with 360P, there is no any better resolution to choose. So the little PCB is blured realy bad.
Sorry no. It was all the camera I had at the time.
@@Oblique_Thought I bought TS480hx some time ago and didn't run it yet... no any antenna, but I'm collecting some knowledge. Anyway all you said and show is good enough to fix radio. Thanks for that.
@@-_Robert_- glad I could help in some way. Let us know how it goes.
It was keying on vox with the other board too.
Sorry. I lost track of things. Building out 9 studios. Lots of work. Contact me at [email protected] please.
Nice fix
Thanks
I have a compressor in front of this boy and he never lights up unless I bypass the compressor. I'm all diy was blessed with this guy for 10 dollars lmao is this okay
Please contact me at [email protected]
thank you bucimara.
Welcome
Hello sir, great demonstration, I also have the same millivoltmeter I am looking to make the test point, can you send me the measurements of the part Regards
Please contact me at [email protected]
@@AERVBlog Hello Sir, I sent you an email, thank you for responding to me.Regards
Thank you for the video, it helps me a lot. I just picked up a Heathkit TC-2 . Can you please help me to find out the parameters for the neon bulb as my one came without it. Thank you in advance.
Hello. That neon bulb is a NE51. Amazon has something. Just search for it there. Not cheap though. Thanks for watching
I have one of these boxes still in use on 99.9 KBAT Monhans (Midland) Texas and they are almost bomb proof! As long as they will stay type accepted I will keep using it.
If it works... I have fixed a few of these. Got one in now that has a PA they swear they never made. 🤨
What is the insertion loss and VSWR?
I dont know yet. Just got the equipment to test that. Will let you know.
Been enjoying your channel, sir! My best recommendation for fixing any of the Focusrite platinum line is to use several 9mm JHP rounds to ensure it never, ever returns to service.
Lol. Ok. Will my friends 40 cal do? Other than that I have a bat.
Save the knobs, always save knobs!
@@AERVBlog true. Sometimes there's gold in them thar hills!
@@Oblique_Thought the bat is satisfying. Go "office space" on it.
The original 700 models are worth tracking down - Aphex originally produced their own VCA (the 1537/A) that was famously used in the original Solid State Logic B/E consoles. The original Dominator has six of them (stereo x 3 bands). Compared to its contemporaries like the DBX202 or the Alison Research EGC-101, I have found the 1537 really 'snaps' well on percussive sources. One other thing people who want vintage analog character on a budget should check out are the DBX 900 series racks/moudles. Silver-side 903 compressors and Aphex 9721 Dominators can really get hairy if that's the vibe you're going for.
Wow. So much info in one post. Thanks.
Love this vid! Thank you! What tool are you using to remove the caps from the board? A desoldering tool that punches them out?
Thanks. No. It is just a regular old electric solder sucker. A cheap one at that.
Javier Lizalde?
I'm sorry. I don't understand
Nice one! Hello how to connect this to mixer? I have Yamaha Mg10uxf- there is one Phones jack (like TRS) labeled FX send. And there’s no label “FX returns” input for mixer. So I tried I plug it to mic input instead, I’m getting hiss /noise. So what kind of cable will work to route this thing to my mixer?
I am not familiar with that mixer but it looks like you would use channels 7/8 line in to the line out of the TC
How to use a Shure M267 mixer
What do you mean?
Thanks for the video. I have several 528e's and I think some of the switches are getting flaky. Do you know where I can order more? The only ones I've found have been in the Netherlands. I'm not confident in the longevity of using contact cleaner.
Contact cleaner won't work. The switches can be gotten from digikey. The DPDT is a F2UEE the bigger one is F4UEE. If you have to change the stacked mic/line and Pad switch contact me at [email protected]. that is not a normal switch. Be careful taking the switches out.
I use to use them in my recording studio for headphone amps with a dummy load on speakers out. Powerful and clear headphone outs on those units.
Yes they are that. I see them everywhere under all kinds of conditions. Rugged little boxed. I like them better than the D 75.
hi, i have one of these.. the left side passes signal but only dry. idk where to send it for repair. can i send to you for repair? thanks
Please contact me at [email protected]
Interesting, usually bad caps from a SMPS have visual signs of failure. I always test capacitors for value, ESR and leakage at working voltage before trusting them. The SCR is probably a crowbar to protect the expensive bits from overvoltage. Thank you for sharing your knowledge with us. Regards, David
Your welcome.
Got mine in today, it worked out of the box. Thank God it did. I do not have your skills and would be disappointed if it was yet another dud that I seem to get lately. Update. After using it for a few hours and doing the calibrations as per. Requirement. I found out all the swr Measurements for coming back at 1.3 swr. So in fact the unit is Faulty, so I asked for a refund.
I am glad it worked for you. It can be a useful little box for sure.
@AERVBlog After doing the Calibration, All SWR readings reads at 1.3 to 1 I did not know I had to recalibrate. After going out and buying resistors and building the short dummy plugs only to find out that don't work. This should be done at the factory. I am sending it back for a refund.
@@johndminigan1869 sorry to hear that. I bought an MFJ-259D that is a whole lot easier. It is not as functional though.
Hey man! I have some problems with my TC Electronic D-Two, hum noise (even in bypass mode) and sometimes the LCD is going to freeze/blank, also whenever I dialing the level and mix knob, hum noise is getting worse and some strange sounds appeared, do you know why? Oh FYI I used TS jack for mono input and output 🙏🏻
All I can think of is power supply problems. It could be bad filter caps but also, if it has 78** or 79** regulators check the bypass caps, usually around 10uF. Also check your grounding both for missing ground or ground loop. Hope that helps.
It is a venerable rig
Yes it is.
I have the same thing. burned transformer. not looking fwd to doing it. after watching your video im going to give it a go. thank you for doing this.,
Your welcome. Good luck. Just take it slow and careful. Let us know how it goes.
Why use that fucking Arduino? Keep it simple stupid KISS Can make simpler Ok up to you
Very nice! I have an old Regency HR-2A that this would be ideal for. It's rock bound but another Arduino for controlling an Si5351 and it could be all frequencies on 2 Meters with all PL tones and it's good to go.
Please keep us informed on the project. That would be a cool upgrade.
Hello, I have a n FT101B version and the received is very low, Please help???? what board could be causing this problem Plse help
I would recommend checking all the switching diodes first. They have a bad habit of leaking.
@@AERVBlog Hi thanks for your reply, will try doing so and advise
@@jacquespitot8634 good luck to ya.
at 14:33 "I dug this thing out and it didn't work. ........ or courze it didnt,
The way it goes.
Are you in Los Angeles, by chance??
Nope. In ohio.
"It's no longer junk". Haha, that's a matter of opinion! Having said that, it was worth the $2 that you paid in entertainment value for us viewers. Thanks for showing us the diagnosis and repair. I have one of these modules that is destined for a small guitar practice amp. I hope I got a good one.
Lol. For some reason I misplaced this thing. No idea where it got off to.
Question. After you replaced all of the caps did you need to do a full alignment of the tuner and "multipath" board?
If I remember correctly I did have to do a quick twittle but not much. I never want to see another one of these.
I just reworked an older JVC video camera with 122 leaky surface mount canister formed electrolytic caps. Thanks very much for the conversation. BTW I am hellbent on finishing this Carver tuner. It is too pretty to junk.
True. They are pretty in the rack. I can't believe you went through all that for a video camera. Even i draw the line somewhere. 122!!!
Ain't it the truth. I love the way you hold back sarcasm.
I am so glad you approve.