old 220w original NRG help plz
Posted: Sun Apr 12, 2015 9:30 pm
Hi guys trying to help new member the producer who needs help with an old original nrg 220w parts and info thanks
old 220w original NRG help plz
Page 1 of 1
Re: old 220w original NRG help plz
Posted: Sun Apr 12, 2015 9:32 pm
Hi guys trying to help new member the producer who needs help with an old original nrg 220w parts and info thanks also any diagrams or related info
Re: old 220w original NRG help plz
Posted: Sun Apr 12, 2015 10:25 pm
All I can remember about that amplifier is that it used a THA15/SD1726 transistor...
Re: old 220w original NRG help plz
Posted: Sun Apr 12, 2015 10:54 pm
Think albert if around will have the knoll for thos one same person needs help with toroidal psu parts has pics just waiting on his membership apprpval
Re: old 220w original NRG help plz
Posted: Mon Apr 13, 2015 1:44 pm
yep thats right i have two of them to re builds2000 wrote:All I can remember about that amplifier is that it used a THA15/SD1726 transistor...
Re: old 220w original NRG help plz
Posted: Mon Apr 13, 2015 1:46 pm
lol good old uncle Albert where are you
Re: old 220w original NRG help plz
Posted: Mon Apr 13, 2015 1:48 pm
and also the
40 watt power amplifier wiring/schematics components list
stereo encoder (mpx) wiring/schematics components list
40 watt power amplifier wiring/schematics components list
stereo encoder (mpx) wiring/schematics components list
Re: old 220w original NRG help plz
Posted: Mon Apr 13, 2015 1:50 pm
plus i want the components list for the 28v circuits as welltheproducer wrote:yep thats right i have two of them to re builds2000 wrote:All I can remember about that amplifier is that it used a THA15/SD1726 transistor...
i know its a relay zenner diodes some resistors n one or two more bits
Re: old 220w original NRG help plz
Posted: Mon Apr 13, 2015 2:00 pm
theproducer wrote:plus i want the components list for the 28v circuits as welltheproducer wrote:yep thats right i have two of them to re builds2000 wrote:All I can remember about that amplifier is that it used a THA15/SD1726 transistor...
i know its a relay zenner diodes some resistors n one or two more bits
Re: old 220w original NRG help plz
Posted: Mon Apr 13, 2015 2:02 pm
[quote="theproducer"][quote="theproducer"][quote="theproducer"][quote="s2000"]All I can remember about that amplifier is that it used a THA15/SD1726 transistor...
yep thats right i have two of them to re build plus i want the components list for the 28v circuits as well
i know its a relay zenner diodes some resistors n one or two more bits and the wiring for the toroidal transformer from the ac and to the board
yep thats right i have two of them to re build plus i want the components list for the 28v circuits as well
i know its a relay zenner diodes some resistors n one or two more bits and the wiring for the toroidal transformer from the ac and to the board
Re: old 220w original NRG help plz
Posted: Mon Apr 13, 2015 2:49 pm
Wow not seen one fo those for a while 
When you say rebuild them, what's actually wrong with them?
When you say rebuild them, what's actually wrong with them?Re: old 220w original NRG help plz
Posted: Mon Apr 13, 2015 8:37 pm
i need the components list and what parts i need for the 28v sides2000 wrote:Wow not seen one fo those for a while
Re: old 220w original NRG help plz
Posted: Mon Apr 13, 2015 8:38 pm
iv managed to find someone to clone the board as the copper on the bottoms gonetheproducer wrote:i need the components list and what parts i need for the 28v sides2000 wrote:Wow not seen one fo those for a while
Re: old 220w original NRG help plz
Posted: Tue Apr 14, 2015 12:42 am
Hello producer! 
maybe you could get in touch with the new owners of NRG? nrg NZ or nrg UK? they may have some
of steve moss's old designs?
To me that looks over complicated for just a PSU? theres more going on? protection circuits possibly? i dont know what you mean by the copper has all gone?? but anyone competent in electronics could easily do a repair!
maybe you could get in touch with the new owners of NRG? nrg NZ or nrg UK? they may have some
of steve moss's old designs?
To me that looks over complicated for just a PSU? theres more going on? protection circuits possibly? i dont know what you mean by the copper has all gone?? but anyone competent in electronics could easily do a repair!
Re: old 220w original NRG help plz
Posted: Tue Apr 14, 2015 8:41 am
the copper circuit board iv managed to locate someone to clone the boardsinus trouble wrote:Hello producer!
maybe you could get in touch with the new owners of NRG? nrg NZ or nrg UK? they may have some
of steve moss's old designs?
To me that looks over complicated for just a PSU? theres more going on? protection circuits possibly? i dont know what you mean by the copper has all gone?? but anyone competent in electronics could easily do a repair!
Re: old 220w original NRG help plz
Posted: Tue Apr 14, 2015 8:51 am
with renewing parts the copper has co,e off the bottom of the circuit boardtheproducer wrote:the copper circuit board iv managed to locate someone to clone the boardsinus trouble wrote:Hello producer!
maybe you could get in touch with the new owners of NRG? nrg NZ or nrg UK? they may have some
of steve moss's old designs?
To me that looks over complicated for just a PSU? theres more going on? protection circuits possibly? i dont know what you mean by the copper has all gone?? but anyone competent in electronics could easily do a repair!
Re: old 220w original NRG help plz
Posted: Wed Apr 15, 2015 12:33 am
Judging by your pics? it looks like youve had a blowout around the fuseholder? which indicates under fault conditions the incorrect fuse has been used instead of rectifying the main fault? causing stress on the tracks of the PCB! I would recommend disconnecting the amplifier and other parts connected to the PSU outputs to verify that the PSU is operating as it should!
Re: old 220w original NRG help plz
Posted: Thu Apr 16, 2015 5:29 pm
it was the relay that went i also replaced the fuse
i know have 4 boards the same for one of my m8's @ kanga-produts and looks like setve moss was working on the 28 volt side as well as the power for the pll/vfo side some strange mind steve moss had onwards and upwards going to test them tomorrow on all circuits 12v 50 v and the 28v hers hopping it goes well
i know have 4 boards the same for one of my m8's @ kanga-produts and looks like setve moss was working on the 28 volt side as well as the power for the pll/vfo side some strange mind steve moss had onwards and upwards going to test them tomorrow on all circuits 12v 50 v and the 28v hers hopping it goes well
Re: old 220w original NRG help plz
Posted: Thu Apr 16, 2015 11:28 pm
hello again producer!
that is just an amplifier you have? and not a complete transmitter by the look of it? But steve had big plans for NRG! so it is quite likely that he would produce a PSU PCB universally suited for all his transmitters! unfortunately we only got to see the tip of the iceberg as they say!
anyways its likely that the output is causing the problems? apart from any obvious faults? if i was you? id power up the PA from an external current protected PSU on its lonesome to check for faults! ive never used the output device in question? but it should not draw anymore than 5amp @ 50v?
that is just an amplifier you have? and not a complete transmitter by the look of it? But steve had big plans for NRG! so it is quite likely that he would produce a PSU PCB universally suited for all his transmitters! unfortunately we only got to see the tip of the iceberg as they say!
anyways its likely that the output is causing the problems? apart from any obvious faults? if i was you? id power up the PA from an external current protected PSU on its lonesome to check for faults! ive never used the output device in question? but it should not draw anymore than 5amp @ 50v?
Re: old 220w original NRG help plz
Posted: Sat Apr 18, 2015 1:29 pm
From what I remember the SD1726 was a similar device to the SD1407, it was actually a 30Mhz device that happened to work ok @ 100Mhz and had useful gain and was dirt cheap. NRG used to sell them on their website for about £30 but if you sourced them out yourself they could be had for much cheaper..
The main drawback was they needed a high amount of drive for 220W out, around 35w, I guess that made it a good amp to follow the NRG 40watt amp...
Also as with the SD1407, its not very efficient, you would need a large current draw to power it to 220W, I would imagine it would need 7-9 amp power supply @50V (assuming 50-60% efficiency)..
Got any pics of the amp? Would be nice to see this beast again
The main drawback was they needed a high amount of drive for 220W out, around 35w, I guess that made it a good amp to follow the NRG 40watt amp...
Also as with the SD1407, its not very efficient, you would need a large current draw to power it to 220W, I would imagine it would need 7-9 amp power supply @50V (assuming 50-60% efficiency)..
Got any pics of the amp? Would be nice to see this beast again