Little Chinese Amp

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NTRRadio
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Little Chinese Amp

Post by NTRRadio » Thu May 21, 2020 2:25 pm

Just messing around with this little 6W Chinese Amp.

Currently, the min input is 0.5. However, what do you think it would take to lower the input to 0.2, but still get 6 watts? Also, I am wondering If I could push the output higher if I swapped the final for a RD15HVF1?

I can't find any info on it on the net other than FleeBay

Any help appreciated.

https://www.ebay.co.uk/itm/Finished-88- ... d8956425b3
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BriansBrain
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Re: Little Chinese Amp

Post by BriansBrain » Thu May 21, 2020 2:37 pm

NTRRadio wrote: ↑Thu May 21, 2020 2:25 pm I am wondering If I could push the output higher if I swapped the final for a RD15HVF1?
It uses a Mitsubishi C1971 Transistor which was discontinued in 1998.

To swap for a RD15VF1 MOS FET would take a few of circuit mods I think :smoke
Aiyima 88-108MHz 6W VHF power amplifier cercuit-s.jpg
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rigmo
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Re: Little Chinese Amp

Post by rigmo » Thu May 21, 2020 3:34 pm

good one... working perfect .
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Re: Little Chinese Amp

Post by NTRRadio » Thu May 21, 2020 6:55 pm

Not 100% sure that diagram is for this amp?

You can drive it with lower input, but obviously lower output. Thought it would be a good little project to modify for maximum smoke, not magic smoke!
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Re: Little Chinese Amp

Post by NTRRadio » Thu May 21, 2020 6:58 pm

Edit: Yes that is the correct diagram - Thanks. :)
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BriansBrain
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Re: Little Chinese Amp

Post by BriansBrain » Fri May 22, 2020 12:20 pm

NTRRadio wrote: ↑Thu May 21, 2020 6:58 pm Edit: Yes that is the correct diagram - Thanks. :)
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NTRRadio
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Re: Little Chinese Amp

Post by NTRRadio » Fri May 22, 2020 8:55 pm

Going to see if I can mod it and will let anyone know if you are interested.
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