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GB4 for Pioneer Super Linear Headphone Amp PCB set?

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EUVL

EUVL

Member
Joined 2003
xen-audio.com
#1
171015 HPA Test Platform 2.JPG


Amazingly, after 5 years of GB3, I am still being asked for PCB sets.
https://www.diyaudio.com/community/...neer-super-linear-headphone-amplifier.328997/

You can see the latest successful build here :
https://www.diyaudio.com/community/threads/the-pioneer-super-linear-circuit.313163/post-7326342

We still have some boards left, enough to support 8 sets.
Minimum 5 subscribers / sets before we can cover our admin costs.
Same as before, each set consists of
2x PCB for Super Linear Amp
2x PCB for SL Current Source
2x PCB for Discrete Regulator Positive
2x PCB for Discrete Regulator Negative
1x PCB for SHPP Headphone Protection
1x PCB for CMoy Cross Feed (through hole version)

Price will be 500 HKD all inclusive (FOB).
Please enter your interest below in a running list.
Minimum 5 sets, maximum 8 sets.


Thank you for your interest,
Patrick
 
Last edited:
#14
bryman79 / USA / 1 set
bogdandascalu87/Ro/1 set
Angchuck/Singapore/ 1 set
Arthur 2 sets
nopants / USA / 1set
pgour / Greece / 1set
chakaandgeorgie / UK / 1 set

Fully subscribed. GB closed.

We are waiting for some PCB restocking.
When they are ready, we shall inform you about payment details.


Thank you for your interest,
Patrick
 
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#15
To All subscribers above, please kindly me send a PM with the following details :

DIYA Nickname
Real Name
Postal address
Email address
PP address (if different)

I shall then contact you by email for payment details.
May take a few days.

Thank you for your patience,
XACOO
 
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Reactions: EUVL
#17
A note to the GB4 subscribers :

The full document will be sent to you by email AFTER you have posted here that you received the registered packages from us.

The original Toshiba and Sanken BJTs used in the circuit are now EOL or obsolete.
I was told by one of you that they could still be found.
But if you cannot, the next best replacement are 2SC2713BL / 2SA1163BL.
Still plenty in stock at Mouser, etc.
The Sankens are available at Digikey and Arrow separately.

In any case, it makes sense to group match together for much better view than individually.
But I shall leave you to decide / organise yourselves.


Patrick
 
#19
As mentioned above :
"The full document will be sent to you by email AFTER you have posted here that you received the registered packages from us."
This is the procedure we follow for years, for good reasons.

In any case, for best results, this is not a project to be done in a rush.
Also mentioned above, the transistors are not readily available, so I strongly you get together to GB / group match.

If this is too much trouble or waiting for you, I suggest you go for one of those great projects at the DIYA store.
https://diyaudiostore.com/collections/boards-headphone-amplifier
https://diyaudiostore.com/products/acp-amp-camp-pre-amp
https://diyaudiostore.com/collectio...ir-headphone-amplifier?variant=30182425526306
https://diyaudiostore.com/collections/whammy-headphone-amplifier/products/whammy
Readily available, and some even fully supplied with parts as kits.
So you can finish them in no time.

We are of course most happy to give you a full refund. Just let us know.
We are just doing this GB4 for a service; more important people can achieve best results.


Best regards,
Patrick
 
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