Hi there i have seen people place a small block of rubber inbetween the heat sink fans and screw in to the rubber expanding the rubber and securing the fan.I am sure you will come up with a good way to attach the fan you are a very resourceful chap.Thanks for the video and have a great day and all the best to you and your family.
Progress. How are you cooling the inside? Fan blowing onto the pallet perhaps? Good that you have the circulator if you put it into an antenna. I would advise adding a fuse and an idiot diode in case you swap the polarity by mistake. The reason we need so much headroom is because of the peak-mean ratio of the signal and requirement to not generate intermods. For DATV these are often referred to as shoulders. They interfere with the adjacent channel, so need to be kept low. Typically 10-30% of the maximum is what you can expect to extract cleanly, without special techniques like pre-distortion, so a 300W pallet is well suited to a 50W DATV PA for QO100. This is why there may be a pair of 160W devices in a 30W cellular base station amplifier and it means you can extract much more power if you don't require the linearity, so retired cellular base station and DVBT amplifiers they make nice high power 13cm and 70cm PAs.
i'd fuse the power in because you don't know what your supply will be in the future prevent accidental damage .. would it be worth putting ferrite beads on the rf patches and a inbuilt tuner .. i don't know how 2.4 works .. also a grounding terminal?
Looking forward to seeing it in operation. I'm pleased to see how well-refined the design is: many microwave amplifiers I've seen have been hand-tuned with little bits of foil. 🙂 This much power with a good antenna is EME-capable. 13cm WAC? Hmmm... 🤔
Hi. Are you sure 12V converter would not create RF noise inside? Also, would be nice to see how you've connected semi-rigid cables to N sockets. It looks very neat.
Thanks for all your great videos. Are you sure the buck converter will not cause rf interferance? If the fans are 12V then can you wire them in series across the 24 volt supply?
It’s 28 Volt supply but if it was 24 that would of been a good suggestion. I’ve seen others use the same buck converter inside 2.4 GHz amp, presumably for a bias control, so fingers crossed it should be okay, if it’s not then I can take a 12V feed from some where else. Cheers
@@TechMindsOfficial Sorry I missed that about the "28" Volts. Im used to having 2 truck batteries in series giving 24 to 29 volts with no problems with electronics. How about a fuse on the input to the buck converter? The 28 volt supply can deliver a lot of current to a short circuit and start a fire. A 1 amp fuse should be enough before the buck converter. I'd put a fuse going to the pallet too.
You can easily put the two fans in series. 28V is not going to hurt them. All electrical devices are typically designed to run at +/- %10 of their stated input voltage. 14 volts on a 12vdc fan is not going to harm it one bit.
Observation: Are you concerned with the possibility of electrolysis occurring with all the dissimilar metals and the amount of power that will be present. Probably won’t be a problem at first but if there’s any humidity, it may happen down the road.
I understand you're not gonna be running it at full power but one wrong move and you can fry QO-100's transponders... I've been doing SSB on QO with barely 5watts of power and RTTY with 0.5 watt and for DATV 30watts is known to be more than enough.
Hi there i have seen people place a small block of rubber inbetween the heat sink fans and screw in to the rubber expanding the rubber and securing the fan.I am sure you will come up with a good way to attach the fan you are a very resourceful chap.Thanks for the video and have a great day and all the best to you and your family.
That is a most excellent idea!!! Thank you so much! Matt
Use rubber mounting from a dvd drive to allow your fans to float and reduce transferee vibration
You should put ferrite beads on each wire that passes through the case wall. Make sure you choose a ferrite mix that works at 2.4 GHz...
Really interesting series of videos Matt. Very much looking forward to the next installment!
Progress. How are you cooling the inside? Fan blowing onto the pallet perhaps?
Good that you have the circulator if you put it into an antenna.
I would advise adding a fuse and an idiot diode in case you swap the polarity by mistake.
The reason we need so much headroom is because of the peak-mean ratio of the signal and requirement to not generate intermods. For DATV these are often referred to as shoulders. They interfere with the adjacent channel, so need to be kept low. Typically 10-30% of the maximum is what you can expect to extract cleanly, without special techniques like pre-distortion, so a 300W pallet is well suited to a 50W DATV PA for QO100. This is why there may be a pair of 160W devices in a 30W cellular base station amplifier and it means you can extract much more power if you don't require the linearity, so retired cellular base station and DVBT amplifiers they make nice high power 13cm and 70cm PAs.
Your microphone sounds great and I’m looking forward to the amplifier working 73s
i'd fuse the power in because you don't know what your supply will be in the future prevent accidental damage .. would it be worth putting ferrite beads on the rf patches and a inbuilt tuner .. i don't know how 2.4 works .. also a grounding terminal?
Looking forward to seeing it in operation. I'm pleased to see how well-refined the design is: many microwave amplifiers I've seen have been hand-tuned with little bits of foil. 🙂
This much power with a good antenna is EME-capable. 13cm WAC? Hmmm... 🤔
Hi. Are you sure 12V converter would not create RF noise inside? Also, would be nice to see how you've connected semi-rigid cables to N sockets. It looks very neat.
Great job Matt!
Nice build quality! Stay safe!
EME with that amplifier and an IC 905 :)
Hi,do u use cpu cooling paste? I would do;)
Thanks for the video!!
Thanks, Matt 😁
Thanks for all your great videos.
Are you sure the buck converter will not cause rf interferance?
If the fans are 12V then can you wire them in series across the 24 volt supply?
It’s 28 Volt supply but if it was 24 that would of been a good suggestion. I’ve seen others use the same buck converter inside 2.4 GHz amp, presumably for a bias control, so fingers crossed it should be okay, if it’s not then I can take a 12V feed from some where else. Cheers
@@TechMindsOfficial Sorry I missed that about the "28" Volts. Im used to having 2 truck batteries in series giving 24 to 29 volts with no problems with electronics. How about a fuse on the input to the buck converter? The 28 volt supply can deliver a lot of current to a short circuit and start a fire. A 1 amp fuse should be enough before the buck converter. I'd put a fuse going to the pallet too.
You can easily put the two fans in series. 28V is not going to hurt them. All electrical devices are typically designed to run at +/- %10 of their stated input voltage. 14 volts on a 12vdc fan is not going to harm it one bit.
Why are you using a symbol for ionizing radiation?
Observation: Are you concerned with the possibility of electrolysis occurring with all the dissimilar metals and the amount of power that will be present. Probably won’t be a problem at first but if there’s any humidity, it may happen down the road.
Have you successfully used the Ereon PowerBlast 300 on 2320Mhz? I am looking at possibly using a couple of pallets on 13cm EME. Rob
I only tested it on 2.4 GHz. You can contact EREON directly for more information on 2320 usage, but I would check the specs first. cheers
This Coax cable , can he stand 100W or 200W ? How much power can SMA connect handle on 2400 Mhz ?
I understand you're not gonna be running it at full power but one wrong move and you can fry QO-100's transponders...
I've been doing SSB on QO with barely 5watts of power and RTTY with 0.5 watt and for DATV 30watts is known to be more than enough.
I’ve been on QO100 DATV for over six months using another 200 Watts amplifier, so I think I will be okay 👍
At lower power the amplifier is not efficient.
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