Looks good man.Thanks!
I'm in the middle of making a Currawong at the minute too but it'll probably be some time before I finish it.
I've most of the components for the PCB already and have put on all the resistors, caps, diodes, LEDs, fuse clips and transistors.
Would you be able to tell me what relays you used by any chance?You're the second guy that are into the Currawong. Theres another Swede who got the complete kit:
http://www.hififorum.nu/forum/topic.asp?TOPIC_ID=93499I had accidently ordered relays from China, thinking they were 2-pole, but they were just single-pole, but they were the right model for this one. They are marked
HK4100F-DC5V-SHG. You should be able to find them everywhere.
Also one issue I have is with the 1/4W resistor directly under the relay at the rear left of the board.
The PCB has 10KΩ printed on it but the schematic I have says 470Ω on it. I assume it's a mistake in the schematic.Have you got ALL articles from Silicon Chip? There's a change to the relay switching. I can send you the details as well looking up the issue with the resistor tomorrow; I'm going to bed right now.
That toroidal with the 37 and 15V secondaries is practically impossible to get. I found it on one Australian site but they want $85 shipping on top of the $55 for the actual transformer.
I may just get one with 2 55V secondaries and a small 6V one to create the high voltage railI ordered the PCB and hard-to-find-components from Silicon Chip and the OP transformers (dirt cheap) from Altronics but I thoought the solution ith the mains transformers were a bit over the top so I simply ordered a special made transformer from
www.fragjanzuerst.de with the full 116V @ 1,2A and 12V @ 4,5A. Now it looks as if the HV is a bit overrated but at least the transformer will not overheat. Besides the transformer has a an overtemperature protection (110 Centigrade). When looking at your Qs and my As, I realise that my relays are 5V, so I have to see if the circuit is supplying 5V or 12V ...
I'll be back tomorrow, anyway! And good luck, this can be an interesting project for tube rolling.