|
What use is an 829B tube?
Hi all,
I just found several 829B tubes - believe it or not in my garage - I must have got them in a box of stuff at a ham fest at one time. A check on Ebay shows they're pretty much worthless for the sake of dollars, but they're so COOL! With the two plate caps that are actually just stiff pins, they look like little Martians. I put a pair on my office credenza just to look geeky cool. Fresh out of the box as NOS they look amazing - just like they were made yesterday. It's a pity they have no value - maybe as a homebrew project?? So can someone tell me what they would have been used for? Something tells me they're a VHF power tube. Any application as a one-tube QRP rig of any sort? Any stories about using them in the past? I've built a lot of little rigs over the years, but never knew about the 829 Thanks, Dave |
"Dave" wrote in message news.com... Hi all, I just found several 829B tubes - believe it or not in my garage - I must have got them in a box of stuff at a ham fest at one time. A check on Ebay shows they're pretty much worthless for the sake of dollars, but they're so COOL! With the two plate caps that are actually just stiff pins, they look like little Martians. I put a pair on my office credenza just to look geeky cool. Fresh out of the box as NOS they look amazing - just like they were made yesterday. It's a pity they have no value - maybe as a homebrew project?? So can someone tell me what they would have been used for? Something tells me they're a VHF power tube. Any application as a one-tube QRP rig of any sort? Any stories about using them in the past? I've built a lot of little rigs over the years, but never knew about the 829 Thanks, Dave The last rig I saw using an 829 was about 35 to 50 watts in the 50 to 70 MHZ range. Makes a good 2 Meter amp. Nice tube. Not QRP IMO... I have three of them around here somewhere. |
"Dave" wrote in message news.com... Hi all, I just found several 829B tubes - believe it or not in my garage - I must have got them in a box of stuff at a ham fest at one time. A check on Ebay shows they're pretty much worthless for the sake of dollars, but they're so COOL! With the two plate caps that are actually just stiff pins, they look like little Martians. I put a pair on my office credenza just to look geeky cool. Fresh out of the box as NOS they look amazing - just like they were made yesterday. It's a pity they have no value - maybe as a homebrew project?? So can someone tell me what they would have been used for? Something tells me they're a VHF power tube. Any application as a one-tube QRP rig of any sort? Any stories about using them in the past? I've built a lot of little rigs over the years, but never knew about the 829 Thanks, Dave The last rig I saw using an 829 was about 35 to 50 watts in the 50 to 70 MHZ range. Makes a good 2 Meter amp. Nice tube. Not QRP IMO... I have three of them around here somewhere. |
"Dave" wrote in message news.com... Hi all, I just found several 829B tubes - believe it or not in my garage - I must have got them in a box of stuff at a ham fest at one time. A check on Ebay shows they're pretty much worthless for the sake of dollars, but they're so COOL! With the two plate caps that are actually just stiff pins, they look like little Martians. They are WWII military tubes. As you surmised, mostly for VHF work. The smaller cousin was the 832B tube, used in the SCR-522 transmitter (driver, PA stages). A very popular conversion for 2-meter AM through the 50s and early 60s. The modern version of the 829 is the 5894 power tube. Pete |
"Dave" wrote in message news.com... Hi all, I just found several 829B tubes - believe it or not in my garage - I must have got them in a box of stuff at a ham fest at one time. A check on Ebay shows they're pretty much worthless for the sake of dollars, but they're so COOL! With the two plate caps that are actually just stiff pins, they look like little Martians. They are WWII military tubes. As you surmised, mostly for VHF work. The smaller cousin was the 832B tube, used in the SCR-522 transmitter (driver, PA stages). A very popular conversion for 2-meter AM through the 50s and early 60s. The modern version of the 829 is the 5894 power tube. Pete |
I just found several 829B tubes - believe it or not in my garage - I
must have got them in a box of stuff at a ham fest at one time. A check on Ebay shows they're pretty much worthless for the sake of dollars, but they're so COOL! With the two plate caps that are actually just stiff pins, they look like little Martians. I put a pair on my office credenza just to look geeky cool. Fresh out of the box as NOS they look amazing - just like they were made yesterday. It's a pity they have no value - maybe as a homebrew project?? So can someone tell me what they would have been used for? Something tells me they're a VHF power tube. They are about the same as a pair of 6146 tubes in one envelope but are more efficient at higher frequencies. Good for about 100 watts out at 2 meters and somewhat ueuable at 440 mhz. I think the old VHV book had an amp in it for 144 mhz that was rated for about 40 watts out on AM and more on CW/SSB. |
I just found several 829B tubes - believe it or not in my garage - I
must have got them in a box of stuff at a ham fest at one time. A check on Ebay shows they're pretty much worthless for the sake of dollars, but they're so COOL! With the two plate caps that are actually just stiff pins, they look like little Martians. I put a pair on my office credenza just to look geeky cool. Fresh out of the box as NOS they look amazing - just like they were made yesterday. It's a pity they have no value - maybe as a homebrew project?? So can someone tell me what they would have been used for? Something tells me they're a VHF power tube. They are about the same as a pair of 6146 tubes in one envelope but are more efficient at higher frequencies. Good for about 100 watts out at 2 meters and somewhat ueuable at 440 mhz. I think the old VHV book had an amp in it for 144 mhz that was rated for about 40 watts out on AM and more on CW/SSB. |
They also make good push-pull stereo amps :-)
-- Gregg *It's probably useful, even if it can't be SPICE'd* http://geek.scorpiorising.ca |
They also make good push-pull stereo amps :-)
-- Gregg *It's probably useful, even if it can't be SPICE'd* http://geek.scorpiorising.ca |
Motorola used them in the "K" strip series of transmitters....60 watts at
150Mhz. Usually driven with a 2E26. That tube with 700 Volts on the plates would make that kind of power all day...Eddie "Dave" wrote in message news.com... Hi all, I just found several 829B tubes - believe it or not in my garage - I must have got them in a box of stuff at a ham fest at one time. A check on Ebay shows they're pretty much worthless for the sake of dollars, but they're so COOL! With the two plate caps that are actually just stiff pins, they look like little Martians. I put a pair on my office credenza just to look geeky cool. Fresh out of the box as NOS they look amazing - just like they were made yesterday. It's a pity they have no value - maybe as a homebrew project?? So can someone tell me what they would have been used for? Something tells me they're a VHF power tube. Any application as a one-tube QRP rig of any sort? Any stories about using them in the past? I've built a lot of little rigs over the years, but never knew about the 829 Thanks, Dave |
| All times are GMT +1. The time now is 04:56 AM. |
Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
RadioBanter.com