2.4 GHz 250 Watts (CW) Powerblast 300 AMP "SOLD" STP

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M0DQW
Posts: 29
Joined: Tue Feb 26, 2019 7:05 pm

2.4 GHz 250 Watts (CW) Powerblast 300 AMP "SOLD" STP

Post by M0DQW » Sun Jun 25, 2023 10:26 pm

For sale is the amp I recently built for my YouTube video series.

If you want to see the amplifier in action it can be found here: https://www.youtube.com/watch?v=aEeQFWDPaNY

Please note that this amp has a 1-Wire temp sensor attached to the heatsink inside the case. This comes out to an external 3 pin connector. This requires 5v, gnd and then there is a 1-Wire connection which can connect to a Pi or Arduino to show the heatsink live temp.

The pallet is an E-Reon Powerblast 300, capable of 250 Watts at CW. I have tested the amp on QO-100 using a Pluto -> Amsat Driver -> Amp, and its works great on DATV.

I don't believe this amp is suitable for NB SSB, as it does not seem to like really low level inputs. Max input is around 160mW although I didn't put in anything like that for testing and using it.

Operating Voltage is 28 to 32 Volts DC, but as the 12v fans are connected in series I always kept the input voltage to 28v.

The manufacture also recommends an SWR of lower than 2:1, the transistor will fail at 2:1. I used a terminated coax isolator when testing, but this is not included in the sale.

£450 + Post (If required)
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Last edited by M0DQW on Sun Jul 09, 2023 9:29 pm, edited 1 time in total.

M0DQW
Posts: 29
Joined: Tue Feb 26, 2019 7:05 pm

Re: 2.4 GHz 250 Watts (CW) Powerblast 300 AMP in Hammond Box

Post by M0DQW » Mon Jul 03, 2023 11:58 pm

Open to any offers, feel free to PM or Email me.

Thanks
Matt
M0DQW

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