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Message |
    
Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 1379
Registered: 9-2004
| | Posted on Thursday, April 06, 2006 - 12:32 am: | 
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im looking to add a 2 pill amp to the base station, and i think i want to get a mobile, and a power supply, and put them in one case together, for a custom look, and i can add fans, and whatever else i want.
so, ive been looking at building the amp myself since CB City has plans and a PC board for one.
im curious if anyone here has ever built one of these before, and what you thought of it.
if i choose to buy the amp, i want one with the tuned input and output circuits like the CBC kit has.
can anyone recommend a mobile 2 pill amp that has this feature?
or at least a known "clean" amp?
thanks for any and all input,
matt |
Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 1384
Registered: 9-2004
| | Posted on Thursday, April 06, 2006 - 11:04 pm: |
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wow, i guess either no one is reading the thread, or there ARE NO "clean" 2 pill amps around.
the texas star 250HD looks like a good solid design, but no input and output tuning networks, unless i missed something on the schem.
also, i really think i want to build the power supply myself, and i already know the circuit im going to use. (very simple, but well filtered and regulated)
the problem is, i cant find anywhere to buy the high current transformer i need.
ideally, i would use a 120v primary, with a 20VAC secondary, with 40 amps. (35 min.)
anyone know of a source for these, other than RF parts co.?
want to buy one new, not used.
im thinking i can build this project for aabout 200-250.
i know this is about the same price as the 2 pill boomer amp, but im hoping that the amp i build will be superior in design, and therefore, superior in output as it pertains to harmonics, stability, duty cycle, etc.
plus i can customize the power supply to put out the exact voltage that i want. (im thinking of running the pills at 16 to 18 volts, depending on what they like).
i hope someone out there is interested or experienced at this stuff, and can lead me in the right direction.
the net is not proving helpful in my searches.
thanks,
matt |
Wildrat
Advanced Member
Username: Wildrat
Post Number: 848
Registered: 12-2003
| | Posted on Friday, April 07, 2006 - 7:54 am: |
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RF Parts also has a board, plans, parts etc for a two pill. I got a couple of boards. They are well printed and thick. I am going to build them, but my ultimate plan is to build something a little larger, which is in the works already. The 2879's just get pricey when you need a few. |
Coyote
Advanced Member
Username: Coyote
Post Number: 723
Registered: 11-2004
| | Posted on Friday, April 07, 2006 - 8:45 am: |
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Kid, have you tried Mouser Electronics? They have quite a few transformers. |
Georgeodjungle
Member
Username: Georgeodjungle
Post Number: 54
Registered: 1-2006
| | Posted on Friday, April 07, 2006 - 1:23 pm: |
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if you build it you'ld have a lil better under standing on how they work...
& more fun than plug & play. |
Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 1385
Registered: 9-2004
| | Posted on Friday, April 07, 2006 - 2:29 pm: |
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yeah, i looked all through mousers catalog.
they have some up to 30 amps, but only at 5vac.
bummer.
with all the companies selling big power supplies, i know that there has got to be a distributor somewhere here in the U.S.
is this another one of those radio conspiracies?
wildrat,
thanks for the info, i will look at their catalog.
too bad they dont have a transformer that meets my needs.
they have one that is close, but i would have to find another circuit design to make it work.
i really want to use the one i already found, as its quite straight forward, and looks easy to breadboard.
here's a link to the design i want to use:
http://www.aaroncake.net/circuits/supply2.htm,http://www.aaroncake.net/circuits/supply2.htm
i too want to use 2SC2879's. i think they have a great DB gain figure.
the reason im only going with a 2 pill is because it gives the greatest S unit increase for the money.
if i were to build a 4 pill, i would only gain 1/2 an S unit.
not worth it to me.
i guess the next amp i build will have to be 2.5K!
THAT will be a project. (and a new credit card!)
keep the posts coming, and thanks for taking an interest.
matt |
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