gar381
Well-known member
NOTICE>>>
NOTICE OF PART CHANGE 10/5/23
Had to happen sometime... The pnp BC560C has been out of production
for some time now and my current supply of NOS Fairchild BC560Cs
that I have been using for last 3 years is running very low. I will be using
the remainder of my supply for only for the matched pnp input pairs for the
garOA10 and gar918.
I knew this day was coming so I have auditioned many possibilities.
From now on I will only be using..
BC557C mouser # 637-BC557C in the following positions...
gar2520 Q6, Q9.
gar1731 Q3, Q4
garAM10 Q1,Q5,Q6,Q7
garOA10 Q2, Q3, Q5, Q7, Q9
gar918 Q3, Q4
Note that these are all on tape and will just drop in place to the silk
just like the original BC560C
Gary
NOTE TO FOLKS SOURCING THEIR OWN PARTS..1/27/2020
The BC560C is no longer being manufactured. If you can
Not source these, with lots of listening time with lots of different
PNP transistors, we have come up with suitable replacements.
gar2520 Q6 and Q9
gar1731 Q3 and Q4
garAM10 Q1, Q5, Q6, and Q7
(gar918 and the gar OA10 will have other recommended replacements)
FIRST CHOICE 10/5/23 Mouser part # 637-BC557C
First choice BC32740TA Mouser Part# 512-BC32740TA
Second choice BC557BF Mouser Part# 512-BC557BTF
Note that both of these transistors have the same pinout as the BC560C
So you should be able to just drop them in place using the silk on the pcb.
If you want to experiment with other PNPs, Make shure the Vceo max
Is at least 45v. hfe is not all that important for these PNPs but above 250
Will work fine. Just be aware of pinout.
All of my kits until future notice, BC560Cs will be included in the kits.
NOTE: DUE TO SUPPLY CHAIN, SOME KITS MAY HAVE THE DIODES LOOSE
PACKED WITH THE RESISTORS INSTEAD OF ON TAPE
There are several versions of both the gar2520 and the gar1731 PCBs
All the build manuals are available for download HERE:
http://capi-gear.com/catalog/support_docs.php#opamps
Make Shure the manual you are downloading is for the PCB version you are using.
Look on the PCB and it will say which version to down load.
ALSO... the BOMs in all the manuals reflect the new murata parts
The Build PDF manual is good but here a few notes that might make the kit
A little less confusing. ( I really need to add this to the Manual :-\)..
1) The little bag with the Millmax pins also contains Q1 and Q2.
2) The tape strip with 3 transistors are Q3, Q4, Q5.
OR in later kits it’s a small bag of 3 transistors labeled Q3, Q4, Q5
3) The tape strip with 2 transistors are Q6, Q9 (the BC560c)
4) The little bag of caps..
The tan ones are CD1, CD2.
The blue ones.. see page 7 of the assembly manual
for value and location.
5) Its a good idea to solder the millmax pins both top and bottom.
6) Please meter the resistors to determine value.
7) After assembly PLEASE double check for unwanted solder bridges
on the Bottom of the PCB. and make SHURE THAT on the top of the
PCB that no component lead wires are touching each other.
8) When inserting your new DOA into the millmax sockets of
a module, Please insert straight down and not at an angle.
DO NOT push down on the component parts but use the edges
of the DOAs PCB. Remove DOAs the same way. Pull straight up
from the edges of the PCB and not at an angle.
9) Never insert a DOA or a module with the power on.
10) HAVE FUN !!
GARY
Note.. The gar2520 PCB is manufactured on a v-scored panel. If you find any sharp edges or loose fibers on the edges
Please use a fine grit sandpaper on the edges to clean them up before assemblying the kit.
Note.. Murata has changed the marking on the Blue 10pf cap from 10D to 10J
These two parts are exaxctly the same. (D = +/- .5pf and J = 5%)
You may see either one of these in my kits.
Note: Dec. 7 2013
MURATA IS DISCONTUNING THE RPC SERIES OF CAPS USED IN THE gar2520 and gar1731!!
The RPE series is being replaced with the RCE series. I will be phasing these in as my RPE
Stock diminishes. I will be using either 50v or 100v based on availability. For you guys buying
Raw PCBs and sourcing your on parts here are some part numbers:
10p 50v.. RCE5C1H100J0A2H03B
10p 100v. . RCE5C2A100J0A2H03B
39p 50v.. RCE5C1H390J0A2H03B
39p 100v.. RCE5C2A390J0A2H03B
47p 50v.. RCE5C1H470J0A2H03B
47p 100v.. RCE5C2A470J0A2H03B
680p 50v.. RCE5C1H681J0A2H03B
680p 100v.. RCE5C2A681J0A2H03B
1000p 50v.. RCE5C1H102J0A2H03B
1000p 50v.. RCE5C2A102J0A2H03B
In a pinch the AVX SR15 series...
50-100v 5% with a lead spacing of 2.5mm (.1”)
Should work fine as I have tested these
Check out chung's excellent build pics on his web site...
http://studio939.blogspot.com/2012/08/gar2520-opamp-build.html
NOTICE OF PART CHANGE 10/5/23
Had to happen sometime... The pnp BC560C has been out of production
for some time now and my current supply of NOS Fairchild BC560Cs
that I have been using for last 3 years is running very low. I will be using
the remainder of my supply for only for the matched pnp input pairs for the
garOA10 and gar918.
I knew this day was coming so I have auditioned many possibilities.
From now on I will only be using..
BC557C mouser # 637-BC557C in the following positions...
gar2520 Q6, Q9.
gar1731 Q3, Q4
garAM10 Q1,Q5,Q6,Q7
garOA10 Q2, Q3, Q5, Q7, Q9
gar918 Q3, Q4
Note that these are all on tape and will just drop in place to the silk
just like the original BC560C
Gary
NOTE TO FOLKS SOURCING THEIR OWN PARTS..1/27/2020
The BC560C is no longer being manufactured. If you can
Not source these, with lots of listening time with lots of different
PNP transistors, we have come up with suitable replacements.
gar2520 Q6 and Q9
gar1731 Q3 and Q4
garAM10 Q1, Q5, Q6, and Q7
(gar918 and the gar OA10 will have other recommended replacements)
FIRST CHOICE 10/5/23 Mouser part # 637-BC557C
First choice BC32740TA Mouser Part# 512-BC32740TA
Second choice BC557BF Mouser Part# 512-BC557BTF
Note that both of these transistors have the same pinout as the BC560C
So you should be able to just drop them in place using the silk on the pcb.
If you want to experiment with other PNPs, Make shure the Vceo max
Is at least 45v. hfe is not all that important for these PNPs but above 250
Will work fine. Just be aware of pinout.
NOTE: DUE TO SUPPLY CHAIN, SOME KITS MAY HAVE THE DIODES LOOSE
PACKED WITH THE RESISTORS INSTEAD OF ON TAPE
There are several versions of both the gar2520 and the gar1731 PCBs
All the build manuals are available for download HERE:
http://capi-gear.com/catalog/support_docs.php#opamps
Make Shure the manual you are downloading is for the PCB version you are using.
Look on the PCB and it will say which version to down load.
ALSO... the BOMs in all the manuals reflect the new murata parts
The Build PDF manual is good but here a few notes that might make the kit
A little less confusing. ( I really need to add this to the Manual :-\)..
1) The little bag with the Millmax pins also contains Q1 and Q2.
2) The tape strip with 3 transistors are Q3, Q4, Q5.
OR in later kits it’s a small bag of 3 transistors labeled Q3, Q4, Q5
3) The tape strip with 2 transistors are Q6, Q9 (the BC560c)
4) The little bag of caps..
The tan ones are CD1, CD2.
The blue ones.. see page 7 of the assembly manual
for value and location.
5) Its a good idea to solder the millmax pins both top and bottom.
6) Please meter the resistors to determine value.
7) After assembly PLEASE double check for unwanted solder bridges
on the Bottom of the PCB. and make SHURE THAT on the top of the
PCB that no component lead wires are touching each other.
8) When inserting your new DOA into the millmax sockets of
a module, Please insert straight down and not at an angle.
DO NOT push down on the component parts but use the edges
of the DOAs PCB. Remove DOAs the same way. Pull straight up
from the edges of the PCB and not at an angle.
9) Never insert a DOA or a module with the power on.
10) HAVE FUN !!
GARY
Note.. The gar2520 PCB is manufactured on a v-scored panel. If you find any sharp edges or loose fibers on the edges
Please use a fine grit sandpaper on the edges to clean them up before assemblying the kit.
Note.. Murata has changed the marking on the Blue 10pf cap from 10D to 10J
These two parts are exaxctly the same. (D = +/- .5pf and J = 5%)
You may see either one of these in my kits.
Note: Dec. 7 2013
MURATA IS DISCONTUNING THE RPC SERIES OF CAPS USED IN THE gar2520 and gar1731!!
The RPE series is being replaced with the RCE series. I will be phasing these in as my RPE
Stock diminishes. I will be using either 50v or 100v based on availability. For you guys buying
Raw PCBs and sourcing your on parts here are some part numbers:
10p 50v.. RCE5C1H100J0A2H03B
10p 100v. . RCE5C2A100J0A2H03B
39p 50v.. RCE5C1H390J0A2H03B
39p 100v.. RCE5C2A390J0A2H03B
47p 50v.. RCE5C1H470J0A2H03B
47p 100v.. RCE5C2A470J0A2H03B
680p 50v.. RCE5C1H681J0A2H03B
680p 100v.. RCE5C2A681J0A2H03B
1000p 50v.. RCE5C1H102J0A2H03B
1000p 50v.. RCE5C2A102J0A2H03B
In a pinch the AVX SR15 series...
50-100v 5% with a lead spacing of 2.5mm (.1”)
Should work fine as I have tested these
Check out chung's excellent build pics on his web site...
http://studio939.blogspot.com/2012/08/gar2520-opamp-build.html
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