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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Jul Wed 21, 2004 4:08 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 9
Anybody heard of a tube RCA Radiotron CRC 861? It looks more like a power meter than a tube <IMG SRC="http://antiqueradios.com/forums/smile.gif"> If you are interested I can send a photo or post one for all to see if this thing is a rare item It has the date Jan. 1942 stamped on it and I got it with some military (Navy) stuff. <P>Thanks for any info as I can't find any after several hours online.<P>Hofmann<P>------------------<BR>


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Jul Wed 21, 2004 5:01 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 30882
Location: Livermore, CA
Hi Hofmann<P> The 861 is a transmitting tube rated to 650 watts. CRC just indicated made by RCA for military use. Interesting looking tube. Makes a nice display. <P> I have data on this tube if someone wants to put it to use...<P>------------------<BR>Norm


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Jul Wed 21, 2004 7:22 pm 
Silent Key

Joined: Jan Thu 01, 1970 1:00 am
Posts: 20548
Location: Sandpoint, IDAHO 83864
I have one on display in the glass front VCR cabinet under the TV along with some other nice old goodies like a tubular audion from 1916, a couple of CX302's, 4-250 and 833A's.<BR>It brings lots of comments from infrequent visitors.<BR>Curt<P>------------------<BR>Curt, N7AH


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Jul Thu 22, 2004 4:28 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 9
Thanks guys! This is a great place to visit and I am impressed with the helpful people!<P>------------------<BR>


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Jul Thu 22, 2004 6:30 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 699
Location: Southern Ga.
I would like to see a picture of it. Seems I may have one put up in a box somewhere I purchased at a militaty base years ago.<P>------------------<BR>Rodney


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Jul Fri 23, 2004 12:19 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 68
Hey,can you post a picture of it? I really loe those old, odd looking valves....<P>Yeah I know, i'm weird <IMG SRC="http://antiqueradios.com/forums/smile.gif"><P>------------------<BR>


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Jul Fri 23, 2004 1:41 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 9
OK I will do!! Thanks for the interest!!<P>------------------<BR>


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Jul Fri 23, 2004 1:47 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 9
I placed a photo in Misc. section. Let me know what you think. I like it!! I am certain it is in good working order. There are several odd tubes I got from this estate, but this one is by far the oddest.<P>Thanks for the interest!<P>------------------<BR>


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Jul Fri 23, 2004 2:20 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 51
Location: Shreveport, La., USA
The 861 was widely used by the Navy in the TBM and the TBK series of transmitters. The TBM was CW or modulated. The TBK was CW only. Both of them used 860s as the oscillator and 860s as doubler or tripler stage aqnd the big old 861s as the Power Output stage. I loaded a TBK up one day so much that the plate was white hot while one of the RMs was sending about 35 WPM. I had the Motorgenerator cranked up as high as I could get it. I was putting in about 2600 watts. Naturally the old 861 gassed up and went west. The Skipper said to give it all I could as he had a message he wanted to get through. As we were between Pearl and Japan I don't remember if he got through or not.<P>------------------<BR>Spivey


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Jul Fri 23, 2004 3:55 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 68
That is so cool. Have you thought of a practical use you can put it too yet?<P>------------------<BR>


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Aug Mon 23, 2004 5:49 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 3
Location: Kannapolis, NC, USA
The infomation about the 861 is interesting as this is the only site I have found with any info. I have an 861 by RCA in my tube collection, but it is labeled UV 861..Were all the 861 series tubes designed for military use, and when were they first introduced? Any help appreciated.<P>Jerry in N. C.


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Aug Mon 23, 2004 6:02 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 30882
Location: Livermore, CA
Hi Jerry<P> RCA 861's were sold to anyone who could afford the tube. It's listed in general Air-Cooled Transmitting Tubes by RCA.<P> I am surprised you have an 861 with prefix UV? UV usually means it should have 4 short pins. An 861 isn't made that way.<P> Not sure the year this tube was first used it's mentioned in 1933 Radio Amateur's Handbook. Maybe Curt or someone else knows?<P> <P>------------------<BR>Norm


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Aug Mon 23, 2004 6:19 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 3
Location: Kannapolis, NC, USA
Thanks for the reply Norm... It is labeled UV 861. Has two round pins. One on either side of a rectangular "slug" which is about 5/8" wide. There is a paper sticker with dates (I assume maintenance dates)stuck onto the tube - the earliest being 6-24-29, but I didn't realize the 861 dated from that far back.<P>Jerry<P>------------------<BR>Jerry


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Aug Mon 23, 2004 6:23 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1952
Location: Federalsburg, MD
Spivey, I love stories like that. Someone has to record little things like that while they still can.<P>------------------<BR>Bryan


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Aug Mon 23, 2004 7:49 am 
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Posts: 6110
Location: Beautiful Downtown Burbank CA
<BLOCKQUOTE><font>quote:</font><HR>Originally posted by rodn:<BR><B>I would like to see a picture of it. Seems I may have one put up in a box somewhere I purchased at a militaty base years ago.<P></B><HR></BLOCKQUOTE><P> <IMG SRC="http://vintageham.com/tubeimages/rca861tube.jpg"> <P>------------------<BR>


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Aug Mon 23, 2004 8:45 am 
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Posts: 3522
Looks a bit like a 552 on steroids doesn't it?<P>------------------<BR>


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Aug Mon 23, 2004 5:51 pm 
Silent Key

Joined: Jan Thu 01, 1970 1:00 am
Posts: 20548
Location: Sandpoint, IDAHO 83864
Mine is exactly as pictured. Looks like the picture was robbed out of a pre-war RCA tube manual? I have no idea on the date of it first coming out. I never researched that tube like I have the UV-202, UV203, UV204 and the like.<BR>Norm- when the 204A first came out in late 1920, it was called the UV204. Yes, I agree the UV prefix is somewhat confusing.<BR>Curt<P>------------------<BR>Curt, N7AH


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 Post subject: Odd Huge Vacuum Tube CRC 861
PostPosted: Aug Mon 23, 2004 6:50 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 3
Location: Kannapolis, NC, USA
My UV 861 is substantially different in internal construction and the glass leads on each side seem to be larger than those pictured. I dont have a digital camera or I would post a picture.<P>Thanks for all the replies, and I hope the topic has not been too boring. The UV nomenclature remains a mystery.<P><P>------------------<BR>Jerry


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