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138.25.51.72
In Reply to: RE: RCA-labeled TS 6550 posted by Tubers on January 05, 2012 at 13:10:48
Taken from the website:
6550 Version 4 - RCA (Original from Tung-Sol)
Made in USA by Tung-Sol (1967 - 1971).
Three holes on gray plate with Triple O-Getter. Last version from Tung-Sol ever made.
This version has been produced by General Electric in the same time and they are same quality and out looking. One of famous Power Pentode from USA.
Nos in box. Matched pair are available.
If its the above 6550 you are querying about, then, yes, they were only manufactured by Tung-Sol and then relabelled as RCA. From memory, some people have indicated that Tung-Sol stopped producing these "coke-bottle" shaped tubes in the early part of the mid 1960's. Many excess tubes were produced, which were then simply shelved/archived and then relabelled accordingly with different brand names and later date codes. Perhaps, others more akin with this information can confirm its validity.
Follow Ups:
Yes, I meant the quote you cited. They are cheaper (assuming it's all real!) than the TS 6550 tubes offered by TubeDepot.
I am still wondering, however, how he could get so many rare vintage tubes in Vietnam...
Perhaps ask the vendor if these babies were acquired as surplus military stock leftover from the Vietnam War. He may have plenty more in stock.
Right after the US pulled out and after the Communists took over, I met a Chinese national who had traveled to Saigon. He told me he went to a street where the shops there were stockpiled with American tubes to the ceiling. There were a lot of American surplus military tubes but he didn't buy any not knowing the milspec numbers and equivalents.
I believe a lot of Hong Kong dealers got their American stocks from Vietnam, as the US sent much of the older military equipment from Korea to Vietnam. Korea still has bunkers full of American transmitting tubes and such. Unfortunately by now, most of the major American stocks are long depleted, although you may find an occasional cache.
1992 marks the fall of the USSR and both Soviet and NATO, SEATO allies dump tremendous amounts of surplus supplies onto the market. Most hit surplus sales in about 1994-5. You could pick up genuine KT-66's in Australia for about $35, Mullard box plates for about $18......
If you missed out then....
Stu
I will ask if he answers my letter.
Because this was a period of transition when SS was replacing tubes in the military and supply officers are known for their resourcefulness as traders.
Really, even in the 1980s the supply depots of all of the services were still chocked full of NOS/NIB tubes (not to mention WWI uniforms) that the various branches would never ever use again.
It's not at all surprising that those tubes stored overseas never made it home!
"You don't need to be a Weatherman to know which way the wind blows"
I know a guy whose grandfather scored two Sherman tanks and a 12-pdr cast iron civil war howitzer in a lot sold at aution in the '80's as "scrap metal". It's fun to know somebody with a running Sherman...
however, there's still a certain midwestern state National Guard that has crates and crates of pre-war cadet gray militia uniforms that weren't issued in 1861.
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