The group buy is closed and PCB sets/brackets/faceplates are being shipped out asap, there are limited leftovers/extras. PLEASE PM OR EMAIL ME BEFORE SENDING ME MONEY. Unless you're just sending me free money, then do that.
So here's what I've been working on:
-Jakob's original G9 circuit
-Adapted for use in 51X format.
-Heaters run off -24 rail in series. (only drawback is the christmas light effect, one goes out, they both go out)
-Boost converter runs off +24V. Relays off the +16V rail, using individual dropping resistors which must be adjusted to your specific coil R.
Big thanks to Peter Purpose. He put a lot of work into his G9 rendition, and I took a couple ideas from him- using 1mm pin sockets as tube sockets and switching my converter IC to the
mc34063, rather than an old fashioned 555 timer circuit. (HV controller is now the Maxim1771CPA+)
Also, big thanks to Jakob, of course, for designing the circuit to begin with. I've played around with guitar amp circuits for years, but I could never design such a simple, great performing mic premap.
Added LL5402 option on output.
Added CM-75101APC and LL1528 option to input.
Added boost converter input filtering
11/20/2012 - Schematic updated, converter controller IC change, layout tweaks.
---PRICES AND PAYPAL INFO---
- PCB sets are 18USD each, shipped in the USA.
- Metalwork and faceplate are 16 per set.
(0.125"/3mm white PCB board with black silkscreen)-no additional shipping if you're buying pcbs already.
If you're buying 4 or more boards, things start getting heavy, so maybe throw a couple extra bones in, if you can.
International guys (there are a lot of you, it seems) you are going to need to chip in a bit for shipping. Since it varies to widely, I would like to just set it at 4USD per package for up to 4 boards. This should cover everyone along with the likely medical bills I will incur after hours of filling out customs forms at the post office.
If you are ready to pre-order, please send payment to roddycluff AT hotmail DOT com and in the notes please include your forum name and how many you're ordering. Please include proper shipping as stated above, and if you're exchanging currency, please include an additional 3.5% for paypal fees.
Example: 2 PCB sets sent to germany - send 41.40USD. That's 36USD + 4USD for shipping + 3.5%
Example 2: 4 PCB sets sent to Kansas - send 72USD
You can send paypal to roddycluff AT hotmail DOT com ****PLEASE remember to add a note with your forum name****