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Capncrunch
| | Posted on Friday, August 16, 2002 - 2:05 pm: | 
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just a few ?i posted in wrong area once today will try it here does anyone know this gla 1000? will it work on 11m also how much power is this amp i see it has 4 6lq6 tubes i know absolutely nothing about tube amps so any info is good im not even sure it works yet but the tubes do glow when turned on and the fan works at least if i need to cool off but that might be all its good for i want to see what info i can get from here b4 i try to get it to work so maybe if it does work i wont blow it up
thanx
capncrunch |
2600
| | Posted on Saturday, August 17, 2002 - 2:33 am: |
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Well, the good news is that the 10-meter band on this one usually tunes 11m just fine. The bad news is that it is suicidal. Really. For whatever reason, they LEFT OUT a third section in the T/R relay to turn off the tube current on standby. They tend to get hot and spontaneously go "BOOM" on standby as a result. Somewhere around here I have a link to some instructions for taking care of that little shortcoming. I think it is part of a bigger article on changing the tubes from 6MJ6 to a Russian tube. It's NOT supposed to use the 6LQ6 tube with the skinny single wire inside leading to the cap. I'll look around for the link and see if I can check back in with it over the weekend.
73
73 |
Capncrunch
| | Posted on Saturday, August 17, 2002 - 9:27 am: |
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thanx 2600
i found an article on the net talkin bout what you are tellin me changing the tubes to el509 svetlana tubes it also says about a mod for ten meter look at the first amp on top of this sites page there is no ten meter setting on that one this is same one i have,i did hook it up and try to key it up but nothing happened the relay on the back didnt move this thing looks like no one ever did anything inside so all the wires dont look very good they look old maybe i should stay away from it but i sure wish it worked i would have to find some one to fix it[probably cost to much]but i dont know of anyone round here oh well thanx again have a good weekend
capncrunch
http://sonic.ucdavis.edu/so02013.html
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Scrapiron63
| | Posted on Saturday, August 17, 2002 - 10:03 am: |
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If your trying to key it with a 'CB' type radio, that might be the problem. You will need an external key for the relay jack on the back of the amp. Ham radios have the relay. I use a 'footpedel' switch for those type of amplifiers. |
Capncrunch
| | Posted on Saturday, August 17, 2002 - 10:49 pm: |
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scrapiron
i see you can tell how ignorant i am to these amps,well no how am i gonna key it without a relay can i rig something that will key it i really had no idea this is the first tube amp i ever even touched but i did see that relay jack on the back and was curious if that had something to do with it so let me get this straight i have to key radio then key amp with some footpedal to talk on it?can i rig some kind of puch button up to do this do you need a relay with your pedal to key the relay in the amp?i gotta figure some way to key it just to make sure it works,got any ideas???
thanx for the info
crunch out |
2600
| | Posted on Sunday, August 18, 2002 - 2:01 am: |
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Nearly every Ham radio has a jack somewhere on the back panel to key an external amp when the mike is keyed. Since amplifiers are not legal on CB, they aren't allowed to provide this feature on a legal 40-channel CB. That's why 'CB'-type amplifiers have a built-in "keying circuit" that senses the RF power from the radio and operates the relay internally. The Radio Shack foot switch is pretty cheap. It's a little easier to buy a plug adapter to match the amp's keying socket than to cut the wire and solder a phono (RCA) male plug to it. The two other options are to install a relay (and jack) in the radio, with a patch cord from the radio 'keying jack' to the one on the amp. OR, have a CB-type keying circuit (and SSB switch) installed inside the amplifier. On price alone, the foot switch wins, hands down.
73 |
Scrapiron63
| | Posted on Sunday, August 18, 2002 - 10:27 am: |
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Capncrunch, your right, you will key your radio, then key the amp, about any kind of switch would work, all its doing is connecting "center to ground", however you really need a switch that will not stay "on" as it needs to be disconnected when you unkey the mike, so your receive will come back. A footswitch works best as you might run out of hands, one keying the mike, the other holding a drink, eating chips, or whatever. hehe
Something else to think about, the ham amps don't have drivers, just finals, they generally mutiply the input by 5 to 10 times. If you just put 5 or so watts in, you will just get 25 or so watts out. It probably needs 50 watts or more to get full output, which is probably about 400 watts for those 4 tubes. Swing or pep watts would be more. So, if your using a cb radio, you will have to use a small driver amp to get much output. You get all that hooked up, then you can do the mojo talk, "i just got my baby driver going, let me kick in my tubes", gettin' up, gettin' up. lol |
Capncrunch
| | Posted on Sunday, August 18, 2002 - 8:13 pm: |
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thanx guys for the info i guuess i need to get me a driver and a foot pedal,i love this forum i can ask you guys the stupid questions instead of lookin like an idiot to the people that actually know me then i can let them think i know what im talkin about,lol anyway thanks again i wouldnt have figured that out on my own for sure i thought maybe it just didnt work if you can think of anything else i need to know tell me pls
thanks
capncrunch |
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