Home Brew Chimney Clips.

[KD1SH]

   Finally getting started on my 3X 3-500Z amp; have three SK410 sockets and SK406 chimneys, but only two sets of chimney clips. Necessity is the mother (I've heard a less polite version) of invention, as they say. I bought a handful of these: https://www.amazon.com/gp/product/B07CQR35FV/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
   Cut each one just shy of the mounting hole, a quick touch-up on the sander, and here's a very workable substitute. In fact, they secure the chimneys with pretty much the exact same spring tension as the Eimac clips.
   (The shorter brass colored ones are the Eimacs in the pictures)

[KD1SH]

  Laying out parts: three chimneys, P-choke, and filament transformer. Getting crowded in there already. Standing room only.

[K8DI]

  Laying out parts: three chimneys, P-choke, and filament transformer. Getting crowded in there already. Standing room only.

If it were me I’d be trying to hang the filament transformer on the bottom of that plate. That’s where the connections are anyway and not a lot else is going on under the deck….

Ed

[KD1SH]

  Agreed 100%, but unfortunately it won't fit under the chassis. The chassis is 3" high—a 4" high chassis would be ideal—but chassis aren't available these days in the variety of sizes that could be had back in the glory days.  If I had a big sheet metal box/pan brake, I'd make my own.

If it were me I’d be trying to hang the filament transformer on the bottom of that plate. That’s where the connections are anyway and not a lot else is going on under the deck….

Ed

[KD1SH]

  I've actually considered milling a square cutout in the chassis top deck, so I can partially submerge the transformer, with the connections underneath and only roughly 1/3 of the transformer protruding above (or 2/3 above depending on how the dimensions shake out. It's a 50 amp transformer; I'd like to get those big secondary terminals as close to the chokes as possible.

[KD1SH]

Another picture, this one of the original clip as received from Amazon, and a modified one beside it.
I'm afraid I've already hijacked my own thread somewhat with talk about the amp; this thread was only to share what I thought was a nifty tip.
More on the progress of the amp build itself will follow in another thread.

[K9MB]

 Agreed 100%, but unfortunately it won't fit under the chassis. The chassis is 3" high—a 4" high chassis would be ideal—but chassis aren't available these days in the variety of sizes that could be had back in the glory days.  If I had a big sheet metal box/pan brake, I'd make my own.

If it were me I’d be trying to hang the filament transformer on the bottom of that plate. That’s where the connections are anyway and not a lot else is going on under the deck….

I wonder if you have considered buying a surplus 200 watt toroid transformer and winding you filament windings on top of the other stuff.
They are very compact and you can get some other useful voltages for free.
You can experiment to discover turns per volt and if you want precision, a variac can be used to set voltages exactly at the socket terminals.A 200mwatt donut will be about 4 inches in diameter and maybe 2vinches thick

Ed

[Opcom]

Thanks for that tip on the chimney brackets. I'm using Coleman lantern chimneys and they just sit there losely. No overheating (yet) but it's a modulator.