[jpaul64]

I know the very good thread "D3a gyrator loaded parafeed design" from 2010.
 
I have some C3g and I never built a CCS parafeed design.
 
The amplifier is powered by an external LiFePO4 Pack (for example, Ansmann PCS 5044273,+19VDC, +5VDC and 6600mAh with dedicated external charger and charging time down to one hour; or too Vision pack with standard acid charger).
 
Two high voltage mezzanine for right and left channel with DC/DC boost converter with LT1533 and Pico transformer (+300VDC@25mA from +12.6VDC).
 
The heating is DC, the tube heaters in serie (LMZ14202H): too +12.6VDC mezzanine.
 
Relay volume control (microcontroller board with Atmel in brown mode and EA Assembly LCD touchscreen) coming.
 
Hammond HWCHAS1710 chassis.
 
I can´t join the schematics as PDF, but I need some comments before ordering PCB! I have no permissions?
 
Is EDCOR PCW10K-7K/300-32 the right choice? And many other questions...
 
Thanks
 

 

[nikongod]

Where are you trying to get the schematics from? 
Can you link to the source? 

 

[jpaul64]

I can´t insert attachments! I suppose I´m only a junior?!
 

 

[colonelkernel8]

Quote:

I can´t insert attachments! I suppose I´m only a junior?!
 

Ah yes, your post count is not high enough. Go ahead and PM me the schematics and I'll post them where you want them.

 

[nikongod]

Where did you get the schematics? Just link to the original site. 

 

[nikongod]

Google returned this thread:
http://www.head-fi.org/t/525520/d3a-gyrator-loaded-parafeed-design/15

 

[jpaul64]

There are my own development.
 
One main PCB for the C3g parafeed amplifier, two low noise non isolated DC/DC converter mezzanine boards for the high voltage and two low noise DC/DC converter boards for heating and battery interfacing.
 
Microcontroller board is coming and also a T-REG regulator board for the two low noise non isolated DC/DC converter mezzanine replacement.
 
I am using Eagle and the schematics and the PBA view are PDF generated datas.
 
I can´t PM the datas, no permission!
 

 

[jpaul64]

Is too bad! No permission for posting!
 
I am also thinking about a portable headphone amplifier:
- LiFePO4 battery pack,
- 1AD4 with +Ub = +100VDC (+24VDC nominal battery pack, DC/DC step-up with LT1533 and Pico transformer),
- +1.25VDC@100mA low noise switching regulator for heating,
- CCS with 3x LT3092 at 500µA,
- virtuel ground with BUF634F,
- N class A OPAMP (AD + LT3092) for 300R and 32R loads at <200mW.

 

[jpaul64]

Ok, learning by doing.
 
Ordering parts, soldering, measuring and listening...

 

[nikongod]

Save the files as JPG and post those. 

 

[jpaul64]

Yeah!
But not really good for the schematics!
(image missing)
 

 

[tomb]

Both Photoshop and Illustrator will let you edit PDF files directly.  Combining two files into a single image is a piece of cake with either of those programs.  You need to make a decision based on the originating software whether it's vector intelligence you need to preserve (use Illustrator) or whether a pixelated image is all you need (Photoshop).

 

[jpaul64]

 

 

 

 
Finally!