Re: Replacing SBL-1 with hand built mixer?
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Hey, Ryan,
The schematic looks exactly like a double-balanced mixer because it is! :)?? Exactly.
And yes, you can build your own, but you may not experience the same level of performance with your home-brew DBMs. It's difficult to achieve identical windings when making these by hand, and the diodes MC uses are optimized for the purpose (ours' almost certainly aren't). Then there's the SBL-1's shielding, which is probably different from home-brew DBMs (many of which are completely unshielded).
In short, you can roll your own. I have done it several times, but I almost always use SBL-1s now (big cache on hand) or ADE-1s (lesser cache). My home-brew radios need all of the mixer performance they can muster, which leave a bit of headroom for me to mess things up elsewhere (typically impedance matching?).
Regards,
--Kirk, NT0Z ? Rochester, MN
My book, "Stealth Amateur Radio," is now available from
www.stealthamateur.com and on the Amazon Kindle (soon)
On Saturday, November 23, 2019, 5:38:48 PM CST, Ryan Flowers <geocrasher@...> wrote:
Hi everyone, I'm looking at many circuits and I see the ones that reference using the SBL-1 mixer. Is there any reason not to just build a double balanced diode ring mixer with discrete components instead? I'm referring to this mixer, which has a schematic that really seems to be the same as a double balanced diode ring mixer.? Thanks for any pointers :)? --
Ryan Flowers W7RLF
https://miscdotgeek.com
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Kirk Kleinschmidt, NT0Z