Brian needs more power... any suggestions ?

[BriansBrain]

few month before i test 350W and get with fine tune 81% efficiency before I brake my PSU i push more then 400w.. i order new PSU 1000W :

81%
That's just the Pallet I assume
OK but, then add the power of the fans exciter etc.
Then there is the efficiency of the power supplies

What is the Overall efficiency ?

[rigmo]

I am a 71 year old retired English man living in Spain with no income other than my small basic pension from the UK.
Unless you would like to make a donation to ''Radio Brian'' that's my economic situation.

I'm now old with rheumatoid arthritis and very bad eye site, precise fiddly stuff now is very difficult
for me accomplish correctly.

Brain, it's not too late for your recovery, you can still get your efficiency back 10-20g. if you are a soldier, the positive effect on our health is guaranteed, unfortunately we have bad health effects out of ignorance and less out of unwillingness!!


Its not easy to match because you need collection of ATC100B capacitance ... etc...
Today is not expensive TinySA and nanoVNA... we are blessed in some way...
https://www.aliexpress.com/item/4001274404758.html i have one on stock
https://www.aliexpress.com/item/1005001273374562.html

[rigmo]

What is the Overall efficiency ?

we're talking about the amplifier, each component is for itself... if it cools well, i.e. it doesn't heat up too much, you can set the fans to a lower number of revolutions.... https://www.aliexpress.com/item/32464248769.html

[BriansBrain]

is installed like this one on left side?

Here is mine, pic taken today (note we have bloody clouds ).
The mount pole is 35mm dia with the top 18cm reduced down to 30mm dia
that is why I have the U bolts down a bit

Dominator-4.jpg

[rigmo]

is installed like this one on left side?

Here is mine, pic taken today (note we have bloody clouds ).
The mount pole is 35mm dia with the top 18cm reduced down to 30mm dia
that is why I have the U bolts down a bit

Dominator-4.jpg

you need lift antenna.-- red mark left side of bar-

[BriansBrain]

Brain, it's not too late for your recovery, you can still get your efficiency back 10-20g. if you are a soldier, the positive effect on our health is guaranteed, unfortunately we have bad health effects out of ignorance and less out of unwillingness!!

I am willing to give anything a go in my head anyway.
Sometimes I think I'm still young and can make anything... like I used to
Example...
This is a 256 channel custom built lighting desk I designed and built for a Disco in North Wales in the mid 80's.

256 Channel OCTAGON Lighting Desk.jpg

But now it's down to what my limbs can accomplish successfully.

Its not easy to match because you need collection of ATC100B capacitance ... etc...
Today is not expensive TinySA and nanoVNA... we are blessed in some way...

BTW: I've got a complete workshop complete with a Siglent SSA3021X SA and a BIRD 4304A Wattmeter

Workshop 10-04-2021.jpg

Looking at the RF pallet if it means de-soldering an trying different SMD caps until I get it right then...
I can just imagine it will end up a total mess with all the print coming off the board
I am old skool and I can manage old skool designed equipment but this modern stuff does my head in

[BriansBrain]

What is the Overall efficiency ?

we're talking about the amplifier, each component is for itself... if it cools well, i.e. it doesn't heat up too much, you can set the fans to a lower number of revolutions.... https://www.aliexpress.com/item/32464248769.html

OK here is my Power Meter my TX rack - Exciter, fans, Linear, power supplies etc
Everything needed to produce the FM signal
The rack consumes +/- 315W for an RF output of 150W = to 47.61904761904761% efficiency

Brian TX Rig Power consumption @ 150W.JPG

[rigmo]

Brain... who can stop you after I sent you the spices if you practice them for the rest of your life. everything has a cause and effect. solve the cause and more consequences will not be repeated or solved.

[rigmo]

What is the Overall efficiency ?

we're talking about the amplifier, each component is for itself... if it cools well, i.e. it doesn't heat up too much, you can set the fans to a lower number of revolutions.... https://www.aliexpress.com/item/32464248769.html

OK here is my Power Meter my TX rack - Exciter, fans, Linear, power supplies etc
Everything needed to produce the FM signal
The rack consumes +/- 315W for an RF output of 150W = to 47.61904761904761% efficiency

Brian TX Rig Power consumption @ 150W.JPG

Drive your fans trough solar panels if no enough sun switch on back... or automatic via battery....
NdFeB ovo moze pomoci kod vaseg problema

[BriansBrain]

Here is mine, pic taken today (note we have bloody clouds ).
The mount pole is 35mm dia with the top 18cm reduced down to 30mm dia
that is why I have the U bolts down a bit

you need lift antenna.-- red mark left side of bar-

*NOTE* the mounting pole is reduced to 30mm dia at the top for 18cm

Please tell me how that will change things.
I contacted the supplier and they said it would not effect anything.
I get good SWR now so what can change ?

[BriansBrain]

Brain... who can stop you after I sent you the spices if you practice them for the rest of your life. everything has a cause and effect. solve the cause and more consequences will not be repeated or solved.

*NOTE* All your emails I moved into my SPAM folder

[sinus trouble]

Haha! That retro Octagon photo is class!!

Anyways, I completely understand your dislike of SMT DIY builds! I am not a fan either!

Looking at your power meter? 315 Watt is quite high for 150 Watt RF output!

If i remember from your earliest posts on this Forum, You was using one of those "Chinese Amps" Correct me if i am wrong?

There is a way that you could more than double your RF output, improve efficiency and save a bit of cash!

As anyone with some experience of electrical systems will know that voltage is inversely proportional to current equal to a total power consumed in Watts!

Therefore, low voltage/high current systems tend to be less efficient compared to high voltage/low current systems!

So, in theory? Increasing your existing gear from 24v to 48v should boost the overall efficiency of both amplifier and PSU?

There is an excellent 300W amplifier which is available with driver stage and protection built in!

If you email the supplier, they may even build and test it for you? (As you are not in the UK)

It may not be what you are looking for? But theres nothing to lose!

Good luck Brian!

[BriansBrain]

Looking at your power meter? 315 Watt is quite high for 150 Watt RF output!

That 315 Watt is NOT just the 150W Linear.
It the consumption of the whole TX rack inc...
1 x Tugicom TX180 exciter
1 x 25V power supply for the Tugicom
4 x 12V power supplies for items below
2 x 120mm x 120mm fans
3 x 70mm x 70mm fans on the 150w Linear
1 x Digital Volt/Current meter in the Linear
1 x small Booster linear 1W in 1W > 5W out
+ Led lights in the SWR's and a digital room temperature meter

If i remember from your earliest posts on this Forum, You was using one of those "Chinese Amps" Correct me if i am wrong?

YES it's a Chinese 150W linears using the MRF9180 MOSFET @ 26V

There is an excellent 300W amplifier which is available with driver stage and protection built in!
If you email the supplier, they may even build and test it for you? (As you are not in the UK)

Like I have mentioned before every linear amp I have found needs at least 3W drive if not more which is the first problem

[rigmo]

Like I have mentioned before every linear amp I have found needs at least 3W drive if not more which is the first problem

that is not correct i heave 300W drive 1w

[BriansBrain]

Like I have mentioned before every linear amp I have found needs at least 3W drive if not more which is the first problem

that is not correct i heave 300W drive 1w

OK
More tech info please

[jvok]

Think the mrf300 will do 300w out 1w in

[sinus trouble]

There is an excellent 300W amplifier which is available with driver stage and protection built in!
If you email the supplier, they may even build and test it for you? (As you are not in the UK)

Like I have mentioned before every linear amp I have found needs at least 3W drive if not more which is the first problem

I shall repeat!

There is an excellent 300W amplifier which is available with DRIVER STAGE and protection built in!
If you email the supplier, they may even build and test it for you? (As you are not in the UK)

Yes it has a driver stage built in! Input power is 0.5 to 1 Watt!

Currently it is DIY! But as i mentioned previously! If you email the supplier, they MAY build and test it for you!

[BriansBrain]

I shall repeat!

There is an excellent 300W amplifier which is available with DRIVER STAGE and protection built in!
If you email the supplier, they may even build and test it for you? (As you are not in the UK)

Yes it has a driver stage built in! Input power is 0.5 to 1 Watt!

Currently it is DIY! But as i mentioned previously! If you email the supplier, they MAY build and test it for you!

OK..... yes I seen you replied with this before but......
Do I have to guess who the supplier is

[rigmo]

Think the mrf300 will do 300w out 1w in

yes i know only one model from Greek guy... 1.25W 300W out

[rigmo]

If you email the supplier, they may even build and test it for you? (As you are not in the UK)

If I think of the same person you mentioned hear. He ignore me almost one year.. i pay him 40GPD for parts make lot time for him (I don't regret time, duty and sharing..).. and i do not get parts even money back !
I have no words for such dishonourable behaviour... and my faith is running out...