I can take a fair guess about you, however I'm reasonably sure neither the FCC nor the NSA sold boat anchors to collectors. I bought a National NC-303 with a sweet AGC mod and matching speaker from the Bell Labs ARC when they upgraded their station. It was fully documented with a partial schematic, and was reversible, but I didn't because it improved SSB and CW reception. BTW I completed the package with the luckiest ever hamfester find, the matching converter cabinet with all 3 converters, 2M, 1.25M, and 70cM. It was a steal because the 1.25M converter is rare as hen's teeth and alone costs many times what I paid for the package. Until I moved and had to downsize I kept my entire collection in perfect physical and electrical condition, like the TV show the price was right both buying and selling. No, I'm not like some hamfester sellers that think their shit is made of gold when it's really made of shit. I also restored 2 R-390s and had to replace the open circuit selenimum rectumfryers with silly cone dynodes, but they are for the DC relay coils and are hidden inside the shield under the power transformer module where nobody knows (except us now) there is anything in there. The actual mod in one is very noticeable but easily reversed with no tools, 2 tubes with 6V heaters replaced with 12V versions and the extremely rare 3TF7 ballast tube replaced with a jumper plug, the tube kept with the receiver so it wouldn't get lost. The idea was should it burn out a replacement costs the proverbial body parts IF you can find one not sold out. The crystal heaters can be switched off for fixed operation in a heated operating position, and the ballast tube was used for 24VDC mobile operation and not needed on our stable 117V mains. Leave it to the Army to call anything like the mating BC-610 transmitter that could only be moved with a forklift mobile equipment.

Oh no, every citation CBers got for "shootin' skip" came from the Allegan Point, MI monitoring station, why only that one we never did understand when "skipland" was only Texas. Well on channel 18 the Black channel they all were in Noke (Newark, NJ) when most were in Hillside and a few in Rahway.

Ah yes, the Icom R-7000 was legendary being legally sold only to specially identified government agencies and employees as well as industrial that showed proper ID creds. The first one I saw was in an FBI monitor van at the infamous Waco incident, a news camera caught it through the open back door that was quickly closed. The second I saw in operation up close and personal while talking to an Atlantic Electric engineer tracing sources of RFI in West Creek. The engineering truck was well equipped to say the least! Thanks to a complaint from Phil K2PG that day he found 2 broken insulators, 2 arcing tree branches, a burned out HPS lamp, and touch control lamps in 2 neighbors' houses. They were the worst noise makers spitting out static and harmonics of the touch plate oscillator, one quickly resolved and the other we had fun with. One so easily resolved by trading the touch lamp for one with a switch, that one got smashed to bits, and I set about finding "usable" harmonics from the uncooperative neighbor's lamps. Those fell within the CW portions of a couple of ham bands, clear the decks for action! Come nightfall we saw the lights on and Phil tuned his Drake TR-7 to the best "usable" harmonic and sent CQ in slow CW, the house looked like Frankenstein's lab with the lights flashing low, medium, high, off, repeat. ROTFLOL! He unplugged the lamps, no noise for a few days, then the cycle began again and again each time he plugged in the lamps. It took a couple of months but he FINALLY got the message, get rid of the lamps.

IIRC analog FM channels are 100KHz wide and transmissions occupy a bandwidth of 75KHz with a 12.5KHz guard band on either side. A 110KHz filter would do the trick, 82KHz better, but now I'm wondering what the attenuation curves are, just what do they look like? If you attenuate sidebands you'll hear annoying distortion leading to listener fatigue. That's extremely undesirable these days since the half hourly ID with callsign requirement was eliminated and there are countless stations using The Hot 92 logo. You can listen for hours and not figure out what station you're listening to, that's why I gave up on broadcast DX years ago.

"Back to the glow-in-the-dark project."
Some think real radios glow in the dark and even wear T shirts with it silk screened on. So why don't you sell T shirts with my version on them? 12 volts is for wimps, real radios can KILL you.

Watkins-Johnson at many times the price I'm sure, they made the best general coverage HF marine radios on the planet. I remember a few years ago several fleets upgraded their radio rooms and used WJ receivers went on the market. I could hardly believe old receivers going for tens of thousands of dollars... EEK!!! I imagine a few hams were missing arms and legs.