How to replace Collins 75A2 Ham Tube Receiver capacitors

This radio came to the shop for a cap make over. New Filter + bypass caps. The job went smoothly. Receiver is working great. My best words of advice, should you want to tackle this task, take your time, have all required parts on hand. Try to make it look as good as factory when your done. These vintage receivers will out live us! Collins make top quality units. Enjoy the history!

[@maddog392]

I was hoping you would check in to the net and have a QSO there at the end with that beautiful thing.

[@simonkormendy849]

That's a cool old radio, I always enjoy watching your videos so please keep them coming.

[@paulkielt9301]

Those old big green and brown resistors are very reliable and hard to find nowadays.

[@ronb6182]

I used 1 watt resisters for 1/3 watt resistors, if you want you can remove the color code markings and paint on the old way of marking the values to keep your set looking original. And capacitors can be installed inside them old cans after you remove the wax and foil. Most have a bakelite bottom just keep the old terminals and hook the new cap to the terminals. It's amazing how you can completely restore a whole radio with all new parts. Don't substitute values and use a voltage reducer because 125 volts is too high for a 110 volt transformers because all the high voltages will go over the specific plate and grid voltages.

[@dhpbear2]

Interesting that the negative lead on that filter cap isn't connected to the chassis. All I can assume is it's come odd grounding scheme that 'stars' all the grounds to somewhere else on the chassis (?)

[@evananderson8452]

Nice Job !!!!

[@elkabong6429]

Hey wait a minute! Nary a drop of wine to be seen in the whole video? What gives, Terry?

[@scharkalvin]

I see a screw and nut near the twist mount cap that could have an insulated tie point added to it. I would have done that to connect the three wires to a pig tail.

[@raymondcote6669]

Most annoying is when green kind wire, even after scraping will not tin. Been there

[@8xlaxx]

Took the Vit. Q caps out?,...might effect the audio quality w/ the newer caps? Nice work on the re-cap tho. Do drop in some Dynaco PAS mod vids once in awhile, OK? Cheers Terry!

[@8xlaxx]

...not trying to be Richard the Dick, either. HA ; )

[@billyrey9679]

Nice Finger nails, who's your tech?

[@jimmusson]

Lots of jobbers, no snozeramuses.

[@klingonbaronessprincesskar5519]

I got one also going to change the caps also the S meter seams dead but maybe something odd has 6sn7 in the narrow band socket

[@pneumatic00]

Nice, Terry. I promise you, one day you're gonna snap those nice Hakko side cutters cutting stuff that's too big. I killed a pair cutting a 1/4" tie-wrap once.

[@elkabong6429]

Great vid, Terry! Thanks!

[@fabinhoosmar]

MAIS UM BOM TRABALHO COLEGA......

[@rciancia]

Terry, you always emphasize the importance of doing the job right.. I appreciate that as I have seen so many radios over the years where people just slop things together. They don't realize it make s it harder to fix and preserve. Always appreciate you advice my friend. Thanks Ron

[@TheBill70800]

Yea what gives Terry.....

[@jimdawes7261]

Did you have Marcia mowing the lawn while you made this vid?

[@d-labelectronics]

Yes, you caught that! haha

[@jimgiordano8218]

Great video. I have a question, I am having trouble locating a, 0.1uF 600v axial electrolytic cap for my Lafayette Comstat 25 CB resto, any suggestions as to a vendor or different value. Thanks

[@ronb6182]

I never knew an electroletic cap was that low i.know there are 1 mfd electroletic caps but I never seen a .1 electroletic cap. Mfd and ufd are the same on these old radios, modern days uf is the proper way of saying or writing microfarad. I probably have tons of mfd written capacitors.

[@jimgiordano8218]

@@ronb6182 Crazy huh! This radio is from the 60's. I will find something that will work. I may have to call Mouser. Thanks for your input. I enjoy your videos, keep them coming.

[@ronb6182]

@@jimgiordano8218 thanks D labs made this video. I wish I had the know how and equipment, but I try to help others out I like tube circuits and if I had my way I would be working on tube circuits as a profession but not many tubes around today. I live in Florida and not many consumer electronics shops around. One day i might set up a tube workbench and repair tube amplifiers. Thanks again.

[@maninthevan53]

Wow Very, very nice

[@daveogarf]

I LIKE the expression, "jobber" - reminds me of the days of yore, and my friend from Battle Creek.

[@apollorobb]

When you replace the small coupling caps make sure the foil side is closest to ground if possible

[@RobertKohut]

Nice!!

[@tomk1tl]

Making "pigtails" make soooo much sense...I used to have to do that @ work working on some of the electronic equipment...miss those days but enjoying retirement and getting more time on the guitar, building amps and putting together another Tele !

[@TheRadioShop]

Thanks Terry for showing the right way to do it. Good job my friend

[@schreds8882]

This looks just like my dad's old receiver. His may have been a slightly different model though. His had this little extension on the tuning knob that let you spin it up/down the dial really fast.

[@klingonbaronessprincesskar5519]

I got one like it

[@ojjenkins7110]

The best AM receiver I ever had. I kind of miss it, it now resides at KDØEZS'S with the 32V-3. It also has the 270G and 8R-1 and the manual. Mine was the one that Ray NØDMS reviewed in ER back in the early 90's.

[@Bigjoedo66]

These old tube Ham radios are really cool. Do they work better than new solid-state Ham radios? just curious

[@DeadKoby]

Capacitors.... the time bombs of old electronics.

[@JohnSmith-eo5sp]

Only if they are electrolytic, wax-paper, or Bakelite. Old low quality batteries left inside these sets are the real time bomb

[@Pyridox]

Terry, you always do nice work. Collins made top notch receivers, more expensive than most others but excellent quality.

[@richysradioroom]

Goodly done. I Had one of these many years ago...But I shipped it back to the U.S from Germany and the sea land container on the ship fell overboard that contained all my stuff. I hope the fish are taking care of it.

[@JohnSmith-eo5sp]

1:40 How old is this thing? Late 40's, 50's ? Is this "Product Detector" the same as a Synchrodyne or Homodyne Detector?

[@ronb6182]

Foil side to ground, but never trust cap markings. Sometimes or even more they are wrong.

[@willrobbinson]

wish i still had a my 51j4 ,sold it when moved location along with lots of stuff u collect over years!

[@Curtislow2]

Have you notice a decrease in XT + RX reception in the past few years? Like from overseas. eg; far east and Europe?

[@Nirky]

Okay you made a pigtail but can you make a snow pigtail?

[@batman387]

Thanks teaching us. You are the MAN! Is Emi on vacation 🙂

[@richardmolby9189]

Oh my goodness does that receiver sound great. De K3OE

[@georgethomas9436]

Thank you D-Lab. I like that there are places where one can buy new parts and kits.

[@bmh67wa]

I would love to own one of those receivers.

[@umajunkcollector]

DO YOU TEST THE XTALS?