^ And how's a fella get that super-cool board you used to connect your mains to the primaries ... with the thermistor and the safety cap????? 🙂
I don't have a F5M kit yet, (was short on cash, F5ML) but I am following the update for the 6L6 build guide closely. 🙂 Always something to learn from his neat builds.
You're in Seattle? What is your preferred finished sized? I'm across the Sound... 1mm x 10.75" with holes just over 6mm.
They will be added in the kits in the next batch or two. Not available separately from the store.
It's based on this, (which would of course work, and is available for purchase...) - https://www.etsy.com/listing/1445855907/cl-60-soft-start-ac-cap-bridge-rectifier
Yes.
Depending on your specific transformer configuration it may need to be connected differently.
Depending on your specific transformer configuration it may need to be connected differently.
Agree thermistors are a good idea w/ 4218. I cribbed off of 6L6's excellent F4 build guide. If you scroll down the reference link you can see his annotated PS schematic, originally from Nelson. Below you can see the bottom of my build with the thermistor / safety cap terminal. Affirm that it works per DMM this morning. Thermistors are CL60.
https://www.diyaudio.com/community/threads/a-guide-to-building-the-pass-f4-amplifier.234355/
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Employed Dim Bulb Tester, PS check good 25.3V per side no issues. Since then wired up the amp boards, awaiting postman w/ binding posts, then will secure backplate and test / bias.
I bought the kit from the store and built my F5m using alternative PCBs. The case was created in 2018 to house a J2 clone using IRFP240. Since I haven't been able to acquire a pair of the proper JFETs, I decided to remove the J2 PCBs and replace them with the F5m's I designed. I am not sure if these pictures will be of interest to other F5m builders, but I know many forum members love to look at DIY audio porn! 🙂
Because of cost minimums associated with the fulfillment company, they’d have to be priced too high to make sense. Bundling them is better.
Or just get them from Randy.
grimberg,
Nice work!
That looks like a "DIY" chassis? You got the heatsinks from Modushop and built the rest?
Nice work!
That looks like a "DIY" chassis? You got the heatsinks from Modushop and built the rest?
I wish Modushop offered heatsinks like those. The heatsinks for that case were cut from two 11"x11" R-Theta model 65340. Back in February of 2003 there was a group buy for those heatsinks. I bought 8 and built an Aleph 2 clone. As time went on some of the participants in that group buy offered their units for sale and I purchased four more. Two of them went into the case shown above, the other two into another case posted here:
https://www.diyaudio.com/community/threads/f6-illustrated-build-guide.277850/page-67#post-5829055
https://www.diyaudio.com/community/threads/f6-illustrated-build-guide.277850/page-67#post-5829055
Yep these heatsinks have long fins, amazing stuff compared to the regular 40mm wide wimpy heatsinks from the store.