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Project: Model REP CRO-46287 Radio Receiver Dept of Navy

Model REP CRO-46287 Radio Receiver Dept of Navy
Model REP CRO-46287 Radio Receiver Dept of Navy
Model REP CRO-46287 Radio Receiver Dept of Navy
Model REP CRO-46287 Radio Receiver Dept of Navy

I was fortunate enough to find this at a Flea Market while on vacation in Branson Mo in September 2019. I have always been fond of Tube equipment from a very young age, and as a 30 plus year electronics hobbyist a 20 plus year Industrial Electrician and more recently a 2 plus year Licensed Amateur Radio operator. I was in the market for one of the old classic tube radios, either a floor standing model, or table top, if I was lucky maybe even the Transcontinental Shortwave style.

I never served in the military, but I am from a long line of Military family, my Dad served in Vietnam in the Marine Corps and throughout my family there has been someone in every branch of the service, however most of them were Navy or Marine Corps Veterans.

As luck would have it, I'm with my wife and I see this obviously old military looking radio, upon closer inspection I see it was a receiver, with SW and AM, and the metal engraved plates told me it was made for the Department of the Navy it was a Model REP CRO-46287 Receiver, that also had a Red Marker that read "WARNING DO NOT USE ABOARD SHIP UNSAFE RADIATION LIMITS". I later found out that this was not really the case well, not as one would assume if you took the Warning at face value... It was more about the issue of an Enemy military force having the ability to find the ship it was being used on due to lack of shielding caused by the oscillating of the tube section that gave off a distinct signature, that in turn could be used to track or locate a ship.

Well at this point, my interest levels are peaked, I got "Clearance" from the boss (My Wife) to make the purchase, but me being me and at a Flea Market, I had to go into haggle mode... I knew it was a consignment piece due to how this Flea Market was set up, asked if the Owner of the section of the Flea Market was there, they said that they thought they were earlier, but did have their contact information and I asked if they minded asking them what their bottom dollar would be. It was marked 79.00 on the tag, and with more knowns, this was not a bad deal by any means, but the truth was I did not know anything about the radios condition, if it worked, if it ever worked, and had not even looked inside of it to see if there was in fact any parts left that made it a radio. So I was told they would take 60.00, I figured if nothing else it would make a fun project if enough of the original parts were there, and or if they worked. So I made the purchase and my daughter was there with us, due to a back injury I was unable to actually pick it up and I asked her well does it feel like anything is in there... She laughs and says yeah considering this is supposed to just be a radio... I'd say there is a LOT of something in there. So that made me feel better at least I had not bought a "Shell" of a radio.

Fast forward to bringing it home with me to Louisiana, and I placed the old girl that I had found to be dated DECEMBER 1945, on my variac and slowly but surely brought the voltage up over several hours and at about 80 volts I began to hear some noise and see some glowing of the filaments in the various tubes. I had roughly tuned it on the AM band to a local station before I even started and at just past 80 volts I heard the speaker playing the local AM station.

This was a good sign on several fronts, first and foremost, I have not let any of the "Magic Smoke" out, it was in fact working, I did notice that the dial indicator lamps were not on even though I was not at full 110 volts, I knew that they should at least be dim at 80 volts. Upon doing some testing I found they were both bad, found some replacements and installed them when they arrived. Brought the radio again up slowly, and yet again, at 80 or so volts the old girl starts to glow, and comes to life, this time with the dial indicator lamps working, remember it is still tuned to the local AM station, and I hear the local broadcast.

So I turn the radio where I can see both the front and the rear of the radio, early on I had removed the radio from its cabinet so that I could physically see any "Magic Smoke" if there was any and hopefully where it was coming from. So I turned it so that I could tune the radio using the dial and also to see if the 6E5 "Eyeball" tube worked or not. Sadly it did not, but I did tune the radio in better by ear, and looked online, and found a NOS 6E5.

One of the unique build features of this radio built by Crosley for the US Navy was the fact that they included a full replacement set of tubes into the build. So I had a spare 6E5 already, and swapped it out with the original, and low and behold when I brought it back up from 0 to 80 Volts the 6E5 worked, and got even better as I went up from 80 volts to about 90/95. At this point I still have not brought her all the way to 110 volts because I am trying my best to not let any smoke out, and also I am trying to slowly but surely bring these old capacitors back to life with the hope being that by bringing them up slowly over time up to near the peak voltage of 110 volts that maybe I will not put too much stress on a now 75 year old radio and the 75 year old parts.

So I have the needed 6E5 which was the original replacement, I had a new "Spare" that I intended on replacing in the radio where the Spare was originally located. I was lucky enough to still be able to read the schematics located on the bottom of the outter cabinet, as well as the two layout diagrams on the left and right sides of the cabinet that shows the layout from the top down, as well as from the bottom up point of view.

Of course I took photos of all of them just incase I may need them later, and possibly to post online in the event someone else has one they want to fix up that does not have clear diagrams to aid them in fixing or repairing their "Moral Radio".

So this is where I am now, I have went through the radio, everything seems to be functioning as it should. It has a "Phono" input that I plan on using with my Google Audiocast, For now, I plan on just giving the radio some TLC, cleaning the pots volume/tone adjustments and for the most part there is not much else to do. The radio was unusually clean inside, the outside did need some cleaning but whereever this radio has been the past 75 years someone or everyone who has had it has taken good care of it.

I do not know this for a fact, but due to the fact it is so clean really both inside and out, I feel this was likely a radio that was made, delivered and probably was Military Surplus that never was field issued. Some Navy guy or radio guy picked it up, and it's been sitting in someones home for most of it's life in a climate controlled room.

There's no way of knowing for sure, but I am glad to have found it, and even more so that it still works and I plan on buying a complete replacement set of all 7 tubes just so that I have them on hand. As time goes on tubes are harder and harder to find and my hope is to have the parts for the next person that might take interest in it after I have passed. This one is a keeper for me, I'll enjoy it hopefully for many years to come.

Project Items:
DescriptionSKUItem IDQtyPriceSubtotalOperations
Capacitor - CE Mfg., 525V, 40/20/20/20µFC-EC40-20X3-5250015201$40.90$40.90
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Total:1$40.90
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