Forum Chat

[Thunderbird]

Looks to me like a 400 watt HF home made amplifier.

Those 2SC2879 output trannies are good for 100 watts pep each.

[cOOter]

Marget that. I updated my last post with the nimbers at the same time.

Drivers are 2SC2290 60 watts each

What's ya reckon on the input to kick them along?

I told Mark to start as low as possible and increase until he gets 400 max out.

[blackbean]

Marget that. I updated my last post with the nimbers at the same time.

Drivers are 2SC2290 60 watts each

What's ya reckon on the input to kick them along?

I told Mark to start as low as possible and increase until he gets 400 max out.

low drive .so just a 12 watt cb should drive those suckers well, those figures on the 2879 .was that at 12 volts or 13.8 ?? texas star uses the same pills and gets 600 out

[Thunderbird]

The drivers are specified as having a power gain of a minimum of 11.8dB and producing 60 Watts PEP each.

Id hazard a guess and say run it at 13.8 volts, and bung less than 4 watts into the front end, assuming there's no input attenuator in the thing.

I do see an antenna switching relay though.

Id expect you'll need a rather hefty power supply capable of 40 amps or more.

And Id pay little attention to "power" figures for some amps, they are often like "watts" quoted for car amplifiers, IE a load a rubbish.

If you don't have any test gear to monitor the output and the current drawn, err on the side of caution, as you'll only draw attention to yourself quicker if you are putting out a distorted and crappy signal.

Make sure you cable, connectors, connections and antenna are up to the power as well, I certainly wouldn't want to be anywhere near that thing when its wick is wound up!

Roger Dee,

[blackbean]

The drivers are specified as having a power gain of a minimum of 11.8dB and producing 60 Watts PEP each.

Id hazard a guess and say run it at 13.8 volts, and bung less than 4 watts into the front end, assuming there's no input attenuator in the thing.

I do see an antenna switching relay though.

Id expect you'll need a rather hefty power supply capable of 40 amps or more.

And Id pay little attention to "power" figures for some amps, they are often like "watts" quoted for car amplifiers, IE a load a rubbish.

If you don't have any test gear to monitor the output and the current drawn, err on the side of caution, as you'll only draw attention to yourself quicker if you are putting out a distorted and crappy signal.

Make sure you cable, connectors, connections and antenna are up to the power as well, I certainly wouldn't want to be anywhere near that thing when its wick is wound up!

Roger Dee,

Running Andrews LMR 400 in the shack into a 3 element flat top , and a sirio gain master witch I wouldn't run power into,  just the flat top ,you might of seen the other videos I have up  on YouTube  so plenty of radios to try it out on , have a 1 kilowatt meter so on the weekend I will fire the old girl up ,also run ferrite clips on all coax and power connections , the 2879's are class ab so should produce a clean signal ,not interested in using it on AM just SSB ch 38

[cOOter]

Roger Dee,

Thanks, Thunderbird 

[King_DaVo]

Yerr you can never have to much "protection" there butterbean!  I get into my ferrite pajamas when i have "Bernhard"out ayyyy Chopper? 

[cOOter]

I get into my ferrite pajamas when i have "Bernhard"

That thing lights up my place when yo key up 7km away. 

[King_DaVo]

[quote author=King_DaVo link=topic=208.msg2447#msg2447 date=1418026576]
I get into my ferrite pajamas when i have "Bernhard"

That thing lights up my place when yo key up 7km away. 
[/quote]

Hahahaha,  At least you can see where your going at night, at least its good for something.   

[cOOter]

The Beast of Turin trailer on Vimeo

I just seen my first 28.3-litre 4 cylinder car  

One of a kind Fiat S76 from 1911...
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