COLLINS 75A4 Restoration

For me, this is maybe the most beautiful receiver ever made from Collins radio, 3 mechanical filters, a real product detector, a pass band tuning, superb Rejection Tuning, and a lot of quality components, a lot of performance for her time, nice and warm audio output . Its still a work in progress, ( as all old rigs), hope you enjoy, Best regards to all Peter XE!YZY
Para mi, este es tal vez, el mas bello receptor jamás construido por la compañía Collins, 3 filtros mecánicos , un detector de producto real, paso de banda, rechazo de sintonia, y muchos componentes de gra calidad, un gran rendimeinto para su época, buen audio , esa aún un trabajo en proceso, ( como todos los radios antiguos) Saludos para todos, Pedro XE1YZY

[@wa4aos]

Very well done and now your 75A4 will be solid and beautiful for many years to come. 73, Glenn WA4AOS

[@scottmorgan5370]

I'd say you have done as good a job restoring this receiver as Paul Carlson does. Both of you do world class museum quality work. Job well done my friend.

[@XE1YZY]

Thanks a lot Scott, it's my passion, best regards

[@tubereceiver7187]

Cats escape all at once when I listen to this music.

[@ghlscitel6714]

I have a R-390/URR boat anchor behind me waiting for reactivation since years. Thanks for the motivation.

[@XE1YZY]

Thanks for watching, good luck with you project,

[@PapasDino]

Pedro - it was a real treat to meet you last Saturday at the LICW Boat Anchor get together and really enjoyed your presentation. I'm now a subscriber! 73 - Dino KLØS

[@XE1YZY]

Hi Dino!, Has been my pleasure too!, thanks a lot for your comments and for suscribe to my channel, hope to copy you on the bands soon! Best 73!

[@bruceclaxton5721]

I am in the midst of doing this exact same process. Have replaced the main filter cap, all the Bettys or Bumble Bees and they are referred to, the electrolytics, a few of the micas and a couple of resistors. Found a couple of bad tubes and now have the front panel off for cleaning and polishing the knobs. Everything is a learning process with this radio. Thankfully I was able to join the Collins group, to get some help from the Elmers out there in radio land. The strangest problem I found so far was a dead spot about 3-4Kc's wide, in exactly the same center spot on the dial, on every band. Yesterday I found it after much searching and probing. The dial cord on these machines, is a linen covered stranded metallic one and it had 2-3 wires broken and splayed out. As those wires passed over the right side top pulley, one of them was contacting a terminal on the noise limiter pot and shorting out the signal on every band.

[@xe1zlgg]

Súper... se escucha muy similar al R390A

[@ferarnaudyoga1095]

Excelente video 👌👌👌

[@XE1YZY]

Muchas gracias

[@hideshitanaka4479]

It's realy great video to whom challenges the maintenace like me. I have struggled to remove dial parts from the shaft and found you are using a puller, that is at time 1:42. In my case, this plate was already enough loosen and freely rotate from the shaft but can't be dettached. Was it same for you? And how didi you attach again to the origial position? Using puller again? JJ1HMR

[@golj1]

Cuando yo sea grande quiero ser como tu

[@buttyboy100]

Gracias por publicar esre excelente video. Sueño con hacer lo mismo con mi Hammarlund HQ180 cuando me retire, pero las letras del panel frontal no eastán grabadas. Tendré que usar letras de transferencia en seco y protegerio con una laca. 73 de GW4JPC

[@anthonymokelkie9360]

Takes long time fix up old communications radio hour a day for few monthes I know bit at time. but its worth it in the end result, Nice radio there. thanks for video, Tony ve4akf

[@XE1YZY]

Thanks for watching, that's the secret, small steps every day 73!

[@anthonymokelkie9360]

My latest projects have been 2 Hammarulund HQ 129 X Receivers. not as complex as Collins radio but still pretty good set 11 tubes in it , Radio sits on work bench and fix little at a time. im on the second one now. SSB sounds excellent on the Hammarlunds. CW too is good, Ham operators did wonders before with these sets. very good radios and you can still fix them today with bit of tube know how. ohhh and AM modulation on short wave or AM broad cast band you cant beat it really. Beautiful set on AM broad cast band at night. excellent. no little transistor radio going compare with 11 tube set. The Collins radios top of line sets. I had one before. Worth all the work to restore them. . And again thank you sharing the video of your Collins beautiful set it is . Tony ve4akf

[@JxH]

😀