| Author |
Message |
    
RCI2990
| | Posted on Wednesday, February 20, 2002 - 3:28 pm: | 
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What is the max the JB 12 will do and is it useable on SSB? Would it make a good driver for another amp like a D&A mav 250? Several guy told me that back in the 1970s they used to use a JB 12 behind their brownings because the brownings didnt doo much swing on AM for driving an amp to max and used the 12 as a driver for a bigger amp like a D&A mav 250 or a phantom 500. |
Jyd
| | Posted on Wednesday, February 20, 2002 - 6:38 pm: |
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the tubes will not last in the maverick if you drive it the 4 small tubes are the drivers and you will end up with a bad keying circut to. i think the jb12 does good by its self it is a good little amp.just use it to talk local. it would effect the phantom the same way. it already has drivers in it |
Beatlejuice
| | Posted on Tuesday, February 18, 2003 - 4:00 am: |
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jb-12 amps do about 65-80 range i recomend the sovtek 6bq5 tube russian made..........its is a good driver for a sb220 heathkit ...im looking for a driver myself .goodlook beatlejuice21@hotmail.com |
Crafter
| | Posted on Tuesday, February 18, 2003 - 12:38 pm: |
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They call them power modulators, that little 6bq5 was a screamer's too. Used mine on a jb 2000 6 meter amp mod'd for 11 meters. |
donnydodaddy (Unregistered Guest)
Unregistered guest
| | Posted on Friday, March 26, 2004 - 6:55 am: |
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I have a JB-12 in the radio shop now and the guy says he"s got it doing about 30watts. I thought the little rascle did more then that,(30watts). Please give me and him some helpful advice if you have any. |
Tech808
Moderator
Username: Tech808
Post Number: 1944
Registered: 8-2002
| | Posted on Friday, March 26, 2004 - 7:15 am: |
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The Blackcat JB-12 was from around 1975 or so.
It was listed as a Base Modulator with 25-40 watts.
Some people got more power out of them depending on drive but 30 watts is in the ball park for power.
Lon
Tech808 |
Hootyal
Intermediate Member
Username: Hootyal
Post Number: 104
Registered: 9-2002
| | Posted on Wednesday, April 21, 2004 - 5:41 pm: |
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How about sideband?? Can they be modded to operate on sideband??? |
Cbblackbeard
Member
Username: Cbblackbeard
Post Number: 55
Registered: 12-2003
| | Posted on Thursday, May 13, 2004 - 12:42 am: |
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I have a chance to buy a Black Cat amp and it sounds alot like the JB 12. The one I found is a two piece set, a power supply and the amp. The amp has two tubes in it and you can tune the input and output. On the bench I saw it do 250 watts. Does this sound like the JB 12? |
Hootyal
Intermediate Member
Username: Hootyal
Post Number: 113
Registered: 9-2002
| | Posted on Thursday, May 13, 2004 - 3:20 pm: |
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No..The JB 12 is one piece, one small (el84 6bq5)tube..modulator box..6in.tall, 7in. wide, 5in. deep. |
Cbblackbeard
Member
Username: Cbblackbeard
Post Number: 56
Registered: 12-2003
| | Posted on Thursday, May 13, 2004 - 11:04 pm: |
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Does anyone know anything about the amp set I described? |
Cbblackbeard
Member
Username: Cbblackbeard
Post Number: 57
Registered: 12-2003
| | Posted on Monday, May 17, 2004 - 6:30 pm: |
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Okay, I ended up buying the amp that I described earlier. It is a Black Cat JB 76B, although I was told that it is sometimes called a JB 200. |
Phreddiet
New member
Username: Phreddiet
Post Number: 2
Registered: 3-2005
| | Posted on Wednesday, March 30, 2005 - 1:29 pm: |
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Anyone know which model came with an internal power supply and two tubes (one smaller than the other). I'm thinking it may be a 150? |
Scrapiron63
Advanced Member
Username: Scrapiron63
Post Number: 794
Registered: 12-2001
| | Posted on Wednesday, March 30, 2005 - 4:47 pm: |
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Here's a page from my Blackcat booklet from about 1978.
http://img.photobucket.com/albums/v208/Familystuff/JB12JB150.jpg
The JB12 has a 6BQ5 final with a 6AQ5 keyer.
The JB150 has a 8417 final with a 6AQ5 keyer. You may have to look and see what tubes your's has. |
Phreddiet
New member
Username: Phreddiet
Post Number: 3
Registered: 3-2005
| | Posted on Thursday, March 31, 2005 - 4:23 pm: |
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Thanks Scrapiron63.....Got any idea how I can locate an owners manual for a jb-150? |
Scrapiron63
Advanced Member
Username: Scrapiron63
Post Number: 796
Registered: 12-2001
| | Posted on Thursday, March 31, 2005 - 7:16 pm: |
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I guess your's has two tubes, a keyer and final so it's a JB 150A-RB. That booklet I have is from 1976, it shows all their products for that year, a price list and other information but no schematics.
I've got a little 4 page operating instructions booklet that came with the 1977 model JB 12B-RB and the JB 150B-RB. The "B" model had the transistor keyer. The RB was for receive boost, that's how they sold them. They wouldn't transmit untill you changed the wiring on the relays. These instructions show how to wire them like the older model. These instructions do have a schematic for the 12B-RB and 150B-RB. If you need them I can email a scanned copy. scrapiron |
Phreddiet
New member
Username: Phreddiet
Post Number: 4
Registered: 3-2005
| | Posted on Friday, April 01, 2005 - 12:26 pm: |
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Thank you Scrapiron!! |
Scrapiron63
Advanced Member
Username: Scrapiron63
Post Number: 798
Registered: 12-2001
| | Posted on Friday, April 01, 2005 - 4:52 pm: |
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Your welcome, glad I could help. |
Popcorn501
New member
Username: Popcorn501
Post Number: 1
Registered: 1-2007
| | Posted on Tuesday, September 11, 2007 - 3:41 pm: |
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i hate to tell you people this but the Jb-12 is the perfect driver for a D&A phantom,and it will not hurt the driver tubes in the phantom,ran one for years!!! |
