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Re: PSU for 100w Veronica amp
Posted: Thu Jul 30, 2020 9:03 pm
by TGillies
LeeCavanagh wrote: ↑Thu Jul 30, 2020 9:45 am
TGillies wrote: ↑Thu Jul 30, 2020 9:11 am
tvtv wrote: ↑Wed Jul 29, 2020 10:51 pm
You would blow your power supply,
You can use more amps but never under rated, you must use one at least 12a, or as previously said you could use two 7 amp supplies if you can’t afford a new 13.8v supply but given one of them is £25 you can likely afford . They do differ in quality though , some are rfi filtered which helps keep your audio clean, that’s why some suggest the meanwell (it’s good but often expensive).
Thanks for the info people, I’m gonna at least get it up and running and give it a bash..
https://www.ebay.co.uk/itm/224057622497
^ would this psu be suitable, seems to me?
This one has me confused, the listing says “ .please note not for use with cb radios”, this isn’t a good sign, why not, possibly too noisy for rf? Just a guess. Did you look at the suggestions in the first reply?
https://www.ebay.co.uk/itm/143629135866
https://www.ebay.co.uk/itm/401931779296
Thanks for clearing the Hollings thing up, at the end of the day it’s pirate radio so doesn’t matter to me who build the things, as long as they work!
Yeah I was confused by the listing too, that’s why I thought I’d post in here before ordering. I would rather that style of PSU as opposed to the mean well style, to prevent cutting the wires on the amp, etc (I’m not too technical). Those ones seem more plug and play
Re: PSU for 100w Veronica amp
Posted: Fri Aug 07, 2020 10:15 pm
by TGillies
All systems are go with the amp, and everything running smoothly. thanks to everyone for the input
Re: PSU for 100w Veronica amp
Posted: Fri Aug 07, 2020 10:55 pm
by sinus trouble
Looks Good TGillies!
Ofcourse there are more efficient amplifiers out there! But it is what it is!
Glad you got it running! Nice work!
Re: PSU for 100w Veronica amp
Posted: Sat Aug 08, 2020 12:55 am
by MiXiN
TGillies wrote: ↑Fri Aug 07, 2020 10:15 pm
All systems are go with the amp, and everything running smoothly. thanks to everyone for the input
What output power are you seeing?
I had an Hollings Amplifier using 1 x 2N6084 Transistor in it once, and it was just about managing 30W.
Yours uses 2, so I'd expect about 60 > 70W.
Re: PSU for 100w Veronica amp
Posted: Sat Aug 08, 2020 12:57 am
by TGillies
MiXiN wrote: ↑Sat Aug 08, 2020 12:55 am
TGillies wrote: ↑Fri Aug 07, 2020 10:15 pm
All systems are go with the amp, and everything running smoothly. thanks to everyone for the input
What output power are you seeing?
I had an Hollings Amplifier using 1 x 2N6084 Transistor in it once, and it was just about managing 30W.
Yours uses 2, so I'd expect about 60 > 70W.
couldnt tell you mate dont have a swr meter at the minute
Re: PSU for 100w Veronica amp
Posted: Sat Aug 08, 2020 12:38 pm
by teckniqs
MiXiN wrote: ↑Sat Aug 08, 2020 12:55 am
TGillies wrote: ↑Fri Aug 07, 2020 10:15 pm
All systems are go with the amp, and everything running smoothly. thanks to everyone for the input
What output power are you seeing?
I had an Hollings Amplifier using 1 x 2N6084 Transistor in it once, and it was just about managing 30W.
Yours uses 2, so I'd expect about 60 > 70W.
I usually get about 60-70w out of one of them. I know its a 40w transistor but in a good circuit it can easily do much more.
Re: PSU for 100w Veronica amp
Posted: Sat Aug 08, 2020 12:49 pm
by Polecat
Am I missing something? Surely with 25w in you'd expect 100w out?
And what do you think of the rig - sound and signal quality?
Re: PSU for 100w Veronica amp
Posted: Sat Aug 08, 2020 2:38 pm
by teckniqs
Polecat wrote: ↑Sat Aug 08, 2020 12:49 pm
Am I missing something? Surely with 25w in you'd expect 100w out?
And what do you think of the rig - sound and signal quality?
Yes exactly, but it just sounds like the amp circuits are so inefficient and detuned on the inputs that it needs as much as 25W for them to give 100W out.
....I would usually drive a single one with about 4 to 5W for the usual 40W+ out at 12V and about 6 to 8W drive to push it a little bit more (60-70w) at 14-15V.