Hi dexter;
Glad you could read the files.....
I run my amps at +/-60VDC, but less can do it e.g. +/-35 to 45VDC. Warning! The drivers Q110 and 111 runs very hot, so you may want to change R118/119 to >30R !! And if you are going to use a low rail Voltage, you may need to decrease R122/123 from 2K7 to 1K8.
You can supply the input/VAS stage with the same Voltage as the output stage or a low current well regulated Voltage that are +/-5VDC higher, so you can drive the output stage from rail to rail.
A supply to input/VAS stage of 3-500mA should do it.
I don't have plans for making a single side layout, because it is impossible to keep the symmetri in the layout with only one layer.
If you need it, I have a few of the PCB's for sale. Contact me by email.
Glad you could read the files.....
I run my amps at +/-60VDC, but less can do it e.g. +/-35 to 45VDC. Warning! The drivers Q110 and 111 runs very hot, so you may want to change R118/119 to >30R !! And if you are going to use a low rail Voltage, you may need to decrease R122/123 from 2K7 to 1K8.
You can supply the input/VAS stage with the same Voltage as the output stage or a low current well regulated Voltage that are +/-5VDC higher, so you can drive the output stage from rail to rail.
A supply to input/VAS stage of 3-500mA should do it.
I don't have plans for making a single side layout, because it is impossible to keep the symmetri in the layout with only one layer.
If you need it, I have a few of the PCB's for sale. Contact me by email.
It seems like some here are interested in the price for the LYNX v3.0 PCBs.....
I only have very few left my self (4 pcs.), and the price per PCB for those is $25.00 + postage (as this was a very small test production).
If some one is interested in starting and handle a groupbuy, I am able to get these boards at a good price (FR-4 with gold plating).
Let me know
I only have very few left my self (4 pcs.), and the price per PCB for those is $25.00 + postage (as this was a very small test production).
If some one is interested in starting and handle a groupbuy, I am able to get these boards at a good price (FR-4 with gold plating).
Let me know
Hi Mr. Jan..
Thanks 4 u tip...its works...the hum are reduce significant..javascript:smilie('')
I plant to use u amp for P.A.., during I bulid the amp I never found the good characteristic as yours...thats are very near the ampl as bulid form the wellkonown manufactured...
I Hope your'nt borring on me..I'll wait your tip 4 my next isues..as I mention in my post earlier...
with regards..
Dodi
Thanks 4 u tip...its works...the hum are reduce significant..javascript:smilie('')
I plant to use u amp for P.A.., during I bulid the amp I never found the good characteristic as yours...thats are very near the ampl as bulid form the wellkonown manufactured...
I Hope your'nt borring on me..I'll wait your tip 4 my next isues..as I mention in my post earlier...
with regards..
Dodi
dodi;
It depends on your supply rails and speaker load.
Your supply is +/-65VDC which in theory should give you 450W peak output.
Here is a little help for the calculations:
http://www.audio-circuit.dk/Formular/ohmslaw.jpg
You may want to take the SOA into conciderations:
http://sound.westhost.com/patd.htm
Do you use the output protection circuit in the LYNX v3 ?
Let me know
It depends on your supply rails and speaker load.
Your supply is +/-65VDC which in theory should give you 450W peak output.
Here is a little help for the calculations:
http://www.audio-circuit.dk/Formular/ohmslaw.jpg
You may want to take the SOA into conciderations:
http://sound.westhost.com/patd.htm
Do you use the output protection circuit in the LYNX v3 ?
Let me know
Dear Sir,
Yes I use speaker protection for LYNX 3...
I plant to use in 15" 700 W 8 Ohm speaker...
On your experince if I expand The layout PCB to 8 Transistor Output...could that configuration give the 800W with 8 ohm...?..or more..?
Sorry I'm begginers in modified the amp...usualy I just copy the layout & bulid without modifying anything...
But when I see your LYNX. I see a different. The layout...Its small and simple...thats interest me..so I think could that small give the Maximum...?
BTW in my country its hard to find the OPA 627..I use LF351 for the OpAmp..as the same with your transistor on the layout....
Thanks 4 your support...
With regard...
Dodi
Yes I use speaker protection for LYNX 3...
I plant to use in 15" 700 W 8 Ohm speaker...
On your experince if I expand The layout PCB to 8 Transistor Output...could that configuration give the 800W with 8 ohm...?..or more..?
Sorry I'm begginers in modified the amp...usualy I just copy the layout & bulid without modifying anything...
But when I see your LYNX. I see a different. The layout...Its small and simple...thats interest me..so I think could that small give the Maximum...?
BTW in my country its hard to find the OPA 627..I use LF351 for the OpAmp..as the same with your transistor on the layout....
Thanks 4 your support...
With regard...
Dodi
Sorry but your rail voltage at +/-65VDC and a 8 Ohm speaker can only give you max 250 Watts =app. 7.5A per rail or <2A per output device.
Adding more output devices normally doesn't give you more output power. If you go for 800 Watts you need much higher rail voltages and get a 4 Ohm speaker
Adding more output devices normally doesn't give you more output power. If you go for 800 Watts you need much higher rail voltages and get a 4 Ohm speaker
Hi dodi
What ever you use 4 pairs (8 devices) or 8 pairs (16 devices) doesn't give you more output power.........
The total Current will still be App. 60VDC (65V - 3 time BE Voltage + other losses) / 8 Ohm = 7.5A
Putting more output devices in (from 4 pair to 8 pair) will only result in, that each device shall handle less than 1A (which is good and makes sure that you keep the devices within the SOA curve), however it demands more Base Current from the drivers....
What ever you use 4 pairs (8 devices) or 8 pairs (16 devices) doesn't give you more output power.........
The total Current will still be App. 60VDC (65V - 3 time BE Voltage + other losses) / 8 Ohm = 7.5A
Putting more output devices in (from 4 pair to 8 pair) will only result in, that each device shall handle less than 1A (which is good and makes sure that you keep the devices within the SOA curve), however it demands more Base Current from the drivers....
Carl, I wrote;
Not that there ever be one
Frankly I don't think there will be any further mods to this, as it plays as intended, and because I have several other projects in progress
There may come a v3.1 sometime
Not that there ever be one
Frankly I don't think there will be any further mods to this, as it plays as intended, and because I have several other projects in progress
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