It’s hot all over 😉
Seriously, the positive leg of the output cap is at 60V. Not as high as above the CCS where it would be over 100V.
I’m going with that and I’ll be sure to mention it in the documentation. Thanks all!
Seriously, the positive leg of the output cap is at 60V. Not as high as above the CCS where it would be over 100V.
I’m going with that and I’ll be sure to mention it in the documentation. Thanks all!
Isn't the latest schematic in post 487 https://www.diyaudio.com/community/threads/schade-common-gate-scg-preamp.380487/post-7137702 rather than as indicated in the opening post?
PCBs have been ordered. I will send PMs to everyone on the list by tomorrow.
Side note (regarding chassis): is there a universal spacer mounting? (like the side panels have of the pre-drilled amp chassis fins)?
Using the latest schematic I made a new parts list for the resistors and the capacitors.
Don't know why is is so stretched out. I had the columns at minimum width from where I coped this.
Time to get those parts on order.
Don't know why is is so stretched out. I had the columns at minimum width from where I coped this.
Time to get those parts on order.
R11* | 100R | |
R12* | 6K8 | |
R13* | 220R | |
R101? | 47K | no longer there |
R102* | 220R | |
R103* | 220R | |
R104? | 220R | no longer there |
R105* | 47K | |
R106* | 1M | |
R107* | 1R | |
R108? | 82K | no longer there |
R109* | 47K | |
R110* | 220R | |
Rg1* | 1K | should this be 10K |
Rlim1* | 10R | |
Rsch1* | 10K | should this be 100K |
RV101* | 500R | |
RV102* | 10K | revised value |
RV103* | 10k | |
C11 | 470uF, 200V | |
C12 | 470uF, 200V | |
C13 | 47uF, 200V | revised value |
C14 | 470uF, 200V | |
C101 | 10uF | |
C102 | 50uF, 50V | |
C102 bp | 1uF | |
C103 | 10uF | |
C104 | 50 uF 50V | |
It is a 10mm x 10mm hole pattern on the baseplate. The new PCB will fit that. I'll pm Gianluca and get some more details. Would be good if the chassis can fit the current PCB.
Latest Schematic:
I will add notes and the parts list tomorrow.
I will add notes and the parts list tomorrow.
Haven’t sent our PMs yet. Figuring out the cost including shipping and Paypal. Hope to do it tonight.
JLPCB tells me PCBs are in production!
JLPCB tells me PCBs are in production!
Shipping to US, Canada, and Europe seems reasonable but Asia is challenging. I’m seeing >$30 for a padded envelope. Anybody have experience with this?
International shipping has become complicated in the last few years. I use the USPS first class mail for almost everything when cost is the main criteria. Still, shipping to some countries in Europe or Asia is quite expensive. USPS international first class shipping is somewhat slow to some countries, and NOT insured. After losing a few shipments many years ago I will not ship anything to Italy, Russia, India or mainland China unless it goes by UPS or Fedex insured, which usually means $30 to $60 to ship a $35 PC board. It seems that the post office, or the customs people in those countries have sticky fingers.
If you are using Paypal to collect the funds for the boards, you can use their Shipstation service. Unless otherwise requested, small parcels go via the USPS, but their rates are often lower by 10% or so. Several users complain of poor service or confiscated goods, but I have never had an issue shipping bare PC boards. Use the words "Printed Circuit Board, unpopulated" and the commodity code 853400 on the customs declaration form.
If you are using Paypal to collect the funds for the boards, you can use their Shipstation service. Unless otherwise requested, small parcels go via the USPS, but their rates are often lower by 10% or so. Several users complain of poor service or confiscated goods, but I have never had an issue shipping bare PC boards. Use the words "Printed Circuit Board, unpopulated" and the commodity code 853400 on the customs declaration form.