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AD-203 Stinger Board

This is the place to ask questions about linear amplifiers, or power supplies

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elbuho
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AD-203 Stinger Board

Post by elbuho » Tuesday, 15 January 2013, 8:43 AM

I saw a mod that makes this board swing about 130 watts pep on AM. Is that for real ? I think buying one.

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Re: AD-203 Stinger Board

Post by MDYoungblood » Tuesday, 15 January 2013, 10:24 AM

You would look at getting just less than 100 watts in most radios. I think it a nice little unit, not too hard to install, works well in most AM radios, never tried it in a SSB yet.

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Re: AD-203 Stinger Board

Post by elbuho » Tuesday, 15 January 2013, 10:49 AM

Thanks ! :icon_e_smile: I guess 100 watts is OK for me here at home.

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Re: AD-203 Stinger Board

Post by Flapjack » Tuesday, 15 January 2013, 11:53 AM

Be sure you upgrade the power cord to the back of your radio too. You need extra capacity to feed the ad200.

Tue Jan 15, 2013 12:57 pm
Flapjack wrote:Be sure you upgrade the power cord to the back of your radio too. You need extra capacity to feed the AD-203.
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Re: AD-203 Stinger Board

Post by elbuho » Tuesday, 05 March 2013, 15:50 PM

Hi guys, Finish installing my AD-203 on a empty amp case I found. Works great. You know if you cut R2 you get 50 watts DK and 145 watts swing only with 4 wats DK from my Galaxy radios.

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Re: AD-203 Stinger Board

Post by Flapjack » Wednesday, 06 March 2013, 7:42 AM

Very Interesting discovery. Let us know how it sounds out there.
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Re: AD-203 Stinger Board

Post by elbuho » Wednesday, 06 March 2013, 16:14 PM

Flapjack wrote:Very Interesting discovery. Let us know how it sounds out there.
Hi, it sounds great. Nice audio reports. I installed a switch between one leg of R2 to where the leg was on the board and you can switch for low to high. Low power is 30 to 50 watts and high power 60 to 150 watts.

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March 06 2013

Sorry from low to high... :drunken:

March 06 2013
elbuho wrote:Hi guys, Finish installing my AD-203 on a empty amp case I found. Works great. You know if you cut R2 you get 50 watts DK and 145 watts swing only with 4 wats DK from my Galaxy radios.

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The coax that comes from the SO-239 to the Stinger is RG-58/U center conductor. The one that comes with this board is junk. :icon_e_sad:
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Re: AD-203 Stinger Board

Post by dime196604 » Wednesday, 06 March 2013, 19:28 PM

That's a nice looking install, and the price they are at dnj radios is nice. Got me thinking of buying two putting em in one case throw in some homemade splitter and combiners, and you got a cheap 200 watt amp
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Re: AD-203 Stinger Board

Post by elbuho » Wednesday, 06 March 2013, 20:57 PM

dime196604 wrote:That's a nice looking install, and the price they are at dnj radios is nice. Got me thinking of buying two putting em in one case throw in some homemade splitter and combiners, and you got a cheap 200 watt amp
Thank you. I got mine from dnj radio. Great service ! They have a $10 Instant Rebate.
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Re: AD-203 Stinger Board

Post by dime196604 » Tuesday, 12 March 2013, 19:21 PM

elbuho wrote:
dime196604 wrote:That's a nice looking install, and the price they are at dnj radios is nice. Got me thinking of buying two putting em in one case throw in some homemade splitter and combiners, and you got a cheap 200 watt amp
Thank you. I got mine from dnj radio. Great service ! They have a $10 Instant Rebate.
With that instant rebate are they 39.99 then?
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Re: AD-203 Stinger Board

Post by 420Snowman » Tuesday, 12 March 2013, 19:47 PM

Looks nice man, good job!!



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Re: AD-203 Stinger Board

Post by elbuho » Wednesday, 13 March 2013, 6:28 AM

dime196604 wrote:
elbuho wrote:
dime196604 wrote:That's a nice looking install, and the price they are at dnj radios is nice. Got me thinking of buying two putting em in one case throw in some homemade splitter and combiners, and you got a cheap 200 watt amp
Thank you. I got mine from dnj radio. Great service ! They have a $10 Instant Rebate.
With that instant rebate are they 39.99 then?
Yes, $50.99 including shipping.

March 13 2013
420Snowman wrote:Looks nice man, good job!!



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Re: AD-203 Stinger Board

Post by Night Crawler » Wednesday, 13 March 2013, 8:47 AM

elbuho wrote:You know if you cut R2 you get 50 watts DK and 145 watts swing
Do you know what you did by cutting R2?

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Re: AD-203 Stinger Board

Post by elbuho » Wednesday, 13 March 2013, 20:46 PM

Night Crawler wrote:
elbuho wrote:You know if you cut R2 you get 50 watts DK and 145 watts swing
Do you know what you did by cutting R2?
Ahh... nop. :shock:
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Re: AD-203 Stinger Board

Post by Night Crawler » Thursday, 14 March 2013, 2:18 AM

You successfully removed the regulated bias voltage from the gates of the final amplifier transistors :biggrin:

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Re: AD-203 Stinger Board

Post by dime196604 » Thursday, 14 March 2013, 6:40 AM

Night Crawler wrote:You successfully removed the regulated bias voltage from the gates of the final amplifier transistors :biggrin:
Don't MOSFETs need that bias in order to work?
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Re: AD-203 Stinger Board

Post by Night Crawler » Thursday, 14 March 2013, 7:40 AM

Look at the schematic when the external bias is removed by cutting R2 it will then be self biased which will be achieved by the rf drive and the associated components going to the gates of the final amplifier transistors.
http://www.rmitaly.com/download/manuals ... el_600.pdf

Only problem is what unknown class of amplification that will be if it's the wrong class for linear amplification it can cause the amplifier to be unlinear and cause spurious and harmonic emissions.

Components are put in an electronic circuit for a purpose.

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Re: AD-203 Stinger Board

Post by elbuho » Thursday, 14 March 2013, 10:40 AM

:icon_e_smile:
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