In todays video we have a look at repairing our Eico 147A. Click show more. Schematic www.cbtricks.co... Discuss this on my site gokarters.com/s... Mike Radio Repair / @mikesradiorepair Contact information gokarters.com/s...
I am just starting out in learning how to repair old tube radios.....A long way to go yet in understanding all that's going on! Thanks for the tutorial on replacing the electrolytics in the existing can. I am certain I will be trying this in the future! Donald
Thank you Buddy. I am restoring the same model 147A and I just took the capacitor(s) apart last night. I was going to cut the cylinder, but I did it exactly the way you show on the video. Not so difficult as I thought, tar and all!
I have a 147 that was sold to me by the fellow that bought a kit in 1958. Still has his chain smoking dad's nicotine coating on it. Used it till he retired a few years ago. Works like a charm.
EXCELLANT !!. You have patience, I didn't think it was going that way at first. Your a skilled individual. Thank you for showing your talents. Hoping you'll bring more !!.
This is extremely helpful. I am looking to equip my shop full of Eico gear. The biggest reason is the availability of diagrams and service information. Thanks.
Excellent video Buddy. With regard to the high voltages on the terminals on this Eico, I have a good story about my signal tracer where in the past someone had fitted a 1930s British 4-pin valve base to the front panel. So a similar idea to the B+ terminal on the Eico. However, these older valve bases have exposed brass sockets for the valve pins to fit in to and one of these was connected straight to the smoothing (filter) circuit. If I recall there was at least 250v on there plus 6.3V AC on another, no protection, nothing to stop you sticking your fingers on it. I was a bit stunned that anyone would have done that. Always pays to have a good look over this old gear to make sure no-ones been messing before sticking volts up it. Regards _ Andrew
I just got a great deal today. A Fluke 1910A freq counter, a GW/ Instek GRG-450B Generator, and n Eico 147A. All for $85 shipped. The Eico is missing a gain knob, and looks to be modified. There's a toggle switch labeled HF/LF next to the RF input jack (switched to a BNC)
That was the best explanation of opening up a can capacitor that I've seen. I usually cut them off with a hack saw but I'll be on the lookout for the ones that I can un-crimp. I'd like to have seen how you crimp it but that wasn't super critical to me
Thanks Michael. On crimping the can just do the reverse with the flat nose pliers. Bend the edge back in on itself. Then with a small hammer tap around it till it is sealed again. Glad you liked it.
If I'm not mistaken the 330 ohm resistor actually measures 406 ohms, not 406K ohms. There was a decimal point in front of the 4. Nice job stuffing the capacitor. Do you do turkeys? Your welcome to come over thanksgiving day and stuff my bird. :) Made quick work of tracking down the noise in the 101. I couldn't work without mine. A truely indispensable tool.
Yes you are correct. I glance and saw the "K" on the end. My other meters do not do that but the Klein does. Easy to mistake something with it.Stuff a turkey eh? I am ready. Yum.Yes this helps tracking down those noise stages.Thanks Mike
+The Radio Shop These are also nice because they have the meter/scope output if you want to monitor it externally. The built in output transformers are also nice when working on old tube radios. And lets not forget they also have a built in wattmeter function.
Yep, very versatile piece of gear. I need to make up some probes and scope connectors for it. Did the video last night. Edited today after work. Going to call it a day. Tomorrow will be a chiller. Good time to come out in the shop to play with my new toy.
Great job! I like to stuff capacitors for the same reasons you pointed out. I have measured new multi-section electrolytic can capacitors and have found significant inter capacitor capacitance. (Between the positive terminals of the capacitor). So if for example, two of these sections are part of a pi power supply filter network, there is a significant capacitance placed across the inductor or resistor from this capacitance. Stuffing capacitors as you so expertly did greatly reduces this capacitance between sections.
Joe, you are correct about the capacitance between each leg. One good thing about the re-stuff is this is no longer an issue. Since each cap is in it's own shielded body. Thanks for stopping in and commenting.
Love it. I'm not a big Eico fan, but that is an instrument I would be very happy to own and use. Great treatment of the re-stuffing of that can; I do that, too. I'll occasionally re-stuff paper ones, depending upon the overall condition of the beast being restored. Thanks, I'll be a sub.
Thank you very much. I too used to not be a fan of Eico, but I sort of like being the underdog at time :-). Paper caps are fun to stuff also. Seen times when removing the wax from the tube it looks brand new.
WHERE CAN I FIND THE SCHEMATICS TO T HE EICO 324? just got the schematics for the 147A This video is invaluable to me i just acquired two EICO units the 324 and the 147A i have been watching you for some time now and ALL your videos cover every thing that i did not learn in a electronics trade school
Buddy, That lip you pry open and re-seal .... in the past I have just milled that away. It's a bit of a to do getting the cap set up in the milling machine, but once that is done, it is pretty straight forward. I guess you could turn that away on the lathe as well... would work just as nicely, I reckon. After that, just fill the old cap up with the new one(s) reassemble and use some loctite to keep it all together... works a treat and none is the wiser! Toodles!! Paddy
Buddy, Thank you for another informative video. Your detail on restuffling the can was awesome. Looking forward to more of your Videos! As a new be to this fascinating world of eletronics I learn so much from you. Thanks again! Joel
Good job restuffing the capacitor the right way. Nice video, thanks. I've seen some people cut them in half, restuff and then tape them back together, I really don't like that, makes them look awful.
Great job on that multi section electrolytic Buddy. Really like the techniques and methods you use to keep everything original. The water certainly has not slowed your enthusiasm or your hands on skills. You just get better (watch out Mike :)
I really enjoyed watching you re-stuff the capacitor and it turned out great and it is looking really good when it is mounted on the signal tracer really nice job👍thank you for showing it, hi from Henning 😊
Thanks. I like the way things look when they have an original appearance. Not everyone thinks this is the correct way to do it lol. Thanks for watchingwww.reddit.com/r/electronics/comments/5dvuxd/eico_model_147a_repair_and_test_stuffing_a/
Great can cap procedure! So, you obviously soldered the neg leads on top of the new caps to a new lead and ran that down the middle, then on the side of the base?
Great episode Buddy you're a true connoisseur of originality re-stuffing those caps! I let Hayseed do that for me when I re-capped my Drake C-Line. Happy Thanksgiving! 73 - Dino KL0S
Thanks Dino. Those Hayseed capacitors are a thing of beauty. Cost a little more but look nice in old equipment. Thanks for stopping in my friend and have a great Thanksgiving.
Very helpful video! Thank you. I was waiting to see your technique to recrimp the bottom of the capacitor. Your recrimp looks almost as good as the origina. Do you show how you do the recrimp in any of your other videos? Thanks, Chris
I think one of my videos show how I crimp the cap. Cannot remember which one though. I use a flat pliers to bend the edge over and then use a small hammer to flatten it down. Very simple. Thanks for the comment.
there is 10uf and a 1uf under the speaker plate that go to rf gain and agc. just changed mine yesterday, very quiet recieve now. (good quiet, not deaf)
The Radio Shop I replaced the PA sockets on my 101....do I have to hook up the "rf out" jack? Is it part of the capacitance of the circuit? Funny thing is now I can only get 70W tuning and before was 120W. Unless the driver went tits up, its the only thing different. :(
I see nothing in the rf out jack that could cause any issue if it is not connected. But something is causing it. Maybe the driver. Taking that the sockets were the same and everything back in place should not have dropped the power.
Hi Radio Shop, Awesome repair, nice to maintain the originality of the unit. Learning a lot from your channel. Between you & Mike, I'm covered. Happy Sub. Have a Happy Thanksgiving, be good, C.
Thanks Cass. I like keeping things original looking if possible. Mikes is a great guy and fun to watch and learn. And a happy turkey day to you. Take care ,Buddy
Hey Buddy - I just got one of these. Added a 3 wire power cord & replaced all caps. I find that when I turn the gain past a little past 2 o'clock in trace RF mode, the oscillator takes off & squeals very loud. Typical? Seems as tho it has a ton of gain. Thanx - Bob
Good job. Yes these have a lot of gain. They will squeal a bit if turned up to high but would not hurt to test all resistors in that circuit to make sure they are where they need to be.
Yes Buddy was a good show and well done must say.. Looking at the bench Hummmm looks like have to keep a eye open for a signal tracer lol lol , like you HB one up same idea you had on yours, yep computer audio speakers lol lol..like always buddy i enjoy all your videos always learn something from them .Thanks and 73's Buddy
Hi Dale, thanks for the nice comments. Saw a email come through with your name on it the other day. Just have not had time to get to it yet. About 100 to 150 a day here.......
I'm sure you realized after the fact that the resistor you thought was open was actually reading 406 ohms. The reading on the multimeter was .406K which is of course 406 ohms. Anyway, good video. Keep them coming.
Hi Buddy. Have you found the correct manual for this unit? If not, I can send you one. I restored my 147A 8 years ago and at the same time I restored the manual.
I’m planing to buy one signal tracer But I didn’t decide which one (HealthKit T-3/T-4/IT-12 or the EICO 147a) One of the issues is power 220v supply I’ll be appreciated for the suggestions
i'm curious as to why not leave the can in place for appearance sake and with a terminal strip or two install the new caps, res etc under the chassis instead ?
EICO Manuals are here www.kevinchant.com/eico.html and the EICO 147A manual can be found here as well bama.edebris.com/manuals/eico/147a/ Maybe you already have them but in the video, you mention that you miss the 147A manual, therefore my comment. I hope it helps.
@@TheRadioShop I have a lot of Eico manuals, my bench is mostly Eico and have manual that are very readable, any time I can help, just let me know, and thank you again for the great channel...
I am just starting out in learning how to repair old tube radios.....A long way to go yet in understanding all that's going on! Thanks for the tutorial on replacing the electrolytics in the existing can. I am certain I will be trying this in the future! Donald
