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Hayden Sidewinder 100


Rare indeed, that uses 4R7 (4.7 ohm) resistors not the typical 10 ohm.

454? Hmmm...Seems it wants to output into INDUCTANCE in series, not capacitance - which those caps, in above photo is parallel output.

Compared to this Datasheet for the SD1446...
upload_2021-1-5_9-18-12.png

​
Might be closer to an SD1446 - runs deep into Class C Grounded INDUCTIVE input and has a conjugate output that needs series Inductance.

So to help with the response, they swamp the input with 4.7 ohm instead. Not as inductive as you see in SD1446 datasheets - but it may explain why the output seems so high. It uses the conjugate it has, they tuned the output for, looks to be 30MHz like you'd find in a typical output network in an AM CB. Uses Single-stage L-filter design.
 
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Thanks Andy, super interesting info. I always try to post up when I run across something different like this as inevitably someone else will have questions on another one in the future.

I did a google yesterday and very little came up for "568BLYCF" but I found this link - https://archive.org/stream/73-magazine-1980-01/01_January_1980_djvu.txt

When I searched the text on the page I found the text below which is why I mentioned 454.

MRF454/568BLYCF
17.10
150ma
30MHz
2/$ 1.00

I guess we can assume the transistors are from late 70's/early 80's which would match the wood grain on the face of the amp :)
 
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Big Kahuna said:
Thanks Andy, super interesting info. I always try to post up when I run across something different like this as inevitably someone else will have questions on another one in the future.

I did a google yesterday and very little came up for "568BLYCF" but I found this link - https://archive.org/stream/73-magazine-1980-01/01_January_1980_djvu.txt

When I searched the text on the page I found the text below which is why I mentioned 454.

MRF454/568BLYCF
17.10
150ma
30MHz
2/$ 1.00

I guess we can assume the transistors are from late 70's/early 80's which would match the wood grain on the face of
Click to expand...
I don't know jack about that amp, but as far as looks, I think it's cool :cool:
 
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To give you some idea of age, the relay has a date code on it from 1975. The fact that it is still working 45 years later, does say something about it.
 
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Shockwave said:
To give you some idea of age, the relay has a date code on it from 1975. The fact that it is still working 45 years later, does say something about it.
Click to expand...

Even crazier is that it was shipped to me in a small cardboard box the exact size of the amp with NO padding or packing material around it whatsoever. I was surprised there weren't 10 parts shaking around inside by the time I got it.
 
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Hayden made the Sidewinder 350 with 1X4 of the BLYCF transistors. Beast of an amp for the era..
 
A friend had a Sidewinder 350 in 1979 and it was already a couple/few years old.
That thing boomed and we thought it was HUGE power for the mobile at the time..
 
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@Big Kahuna - did you realize that back in those days you used to send in a "Readers information card"?

Yes! You'd circle the "number" listed - in this case the ASCII conversion failed but those are CATALOG prices!

And to think we wanted to give out our name and address for the sake of those low prices and KEWL stuff.

A $1.00??? WOW! LOL!

I'm thinking that they kept the 454 and BCYF types in the same "realm" doesn't mean they meant it as swappable, just the same "bin" to lump them in.

Man! Those were the days!
 
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