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Thread: Interesting, a Heathkit SB-240 Linear Amp

  1. #11
    Istanbul Expert N2NH's Avatar
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    He might have a point. There are other sources for information on the SB-240 if you do a bing search.

    This thread on another page is interesting.

    The picture on that thread is different from the one in the OP. This one has SB-104 paint.

    Lettering that doesn't look factory made says "2KW Linear Amplifier." (Picture)
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  2. #12
    Master Navigator AE1PT's Avatar
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    Say, does anyone besides me notice the labeling in the lower left corner that says:

    HOHMBRU ELECTRONICS

    Just checking...
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  3. #13
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    Quote Originally Posted by AE1PT View Post
    Say, does anyone besides me notice the labeling in the lower left corner that says:

    HOHMBRU ELECTRONICS

    Just checking...
    Just noted that. The first picture appears to be slightly photoshopped too. Note the lettering "Amplifier" (Can't read the rest). It doesn't look properly aligned to the picture. In other words, it doesn't look like it's printed on the unit, but added into the photo.
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  4. #14
    Orca Whisperer W3WN's Avatar
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    Quote Originally Posted by N2NH View Post
    He might have a point. There are other sources for information on the SB-240 if you do a bing search.

    This thread on another page is interesting.

    The picture on that thread is different from the one in the OP. This one has SB-104 paint.

    Lettering that doesn't look factory made says "2KW Linear Amplifier." (Picture)
    The first link starts off with a post from LA6OP, and continues on with some speculation. It looks like the second link might be a picture of his amp.

    Now I'm not afraid to admit being a bit skeptical about these units when this first surfaced, as I explained earlier. But as the stories are coming out, and as they're clearly not contradictory, but all fit together... it's making sense. (Which is not to say that SOME of the "SB-240's" out there might not have been the actual prototypes, but that's another story)

    Since they were prototypes, it also makes sense that they might have different paint schemes, or that they may resemble previous models such as the SB-220. Simply put, it's likely that there were older cases & panels either sitting around as spares, or that could be easily reproduced. So why not use them? If they didn't work out in the protoype, and otherwise the rig proceed further towards production, a redesign or two could have happened. And if they did work out, why re-invent the wheel?
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  5. #15
    Pope Carlo l NQ6U's Avatar
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    Quote Originally Posted by W3WN View Post
    I was a little floored when I saw that article the other day in QST.
    Which issue was that? I missed it completely.
    All the world’s a stage, but obviously the play is unrehearsed and everybody is ad-libbing his lines. Maybe that’s why it’s hard to tell if we’re living in a tragedy or a farce.

  6. #16
    Orca Whisperer W3WN's Avatar
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    Quote Originally Posted by KJ6BSO View Post
    Which issue was that? I missed it completely.
    April 2013. And no, this wasn't the "April Fool's" article.
    “Nobody is going to feel sorry for us. 90% of the people don’t care, the other 10% are glad it happened.” — Clint Hurdle, 2019

    BAN THE DH!

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  7. #17
    La Rata Del Desierto K7SGJ's Avatar
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    Quote Originally Posted by W3WN View Post
    The first link starts off with a post from LA6OP, and continues on with some speculation. It looks like the second link might be a picture of his amp.

    Now I'm not afraid to admit being a bit skeptical about these units when this first surfaced, as I explained earlier. But as the stories are coming out, and as they're clearly not contradictory, but all fit together... it's making sense. (Which is not to say that SOME of the "SB-240's" out there might not have been the actual prototypes, but that's another story)

    Since they were prototypes, it also makes sense that they might have different paint schemes, or that they may resemble previous models such as the SB-220. Simply put, it's likely that there were older cases & panels either sitting around as spares, or that could be easily reproduced. So why not use them? If they didn't work out in the protoype, and otherwise the rig proceed further towards production, a redesign or two could have happened. And if they did work out, why re-invent the wheel?
    Because they reinvented the cart?
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  8. #18
    Pope Carlo l NQ6U's Avatar
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    Quote Originally Posted by W3WN View Post
    April 2013. And no, this wasn't the "April Fool's" article.
    Okay, thanks. That issue just arrived in this morning's mail, which would explain why I hadn't seen the article.
    All the world’s a stage, but obviously the play is unrehearsed and everybody is ad-libbing his lines. Maybe that’s why it’s hard to tell if we’re living in a tragedy or a farce.

  9. #19
    Mystical Drummer NY4Q's Avatar
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    Looks like some dimwit bought it, so there ya go.

    I really need to start selling those "Triple Swing Diodes" on FleaBay.

  10. #20
    'Grumpy old bastid' kb2vxa's Avatar
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    I'm not in any kind of position to judge but something made me wonder.

    "During beta testing to disguise the amplifier the front trim strip said HOHMBREW Electronics model SIGNAL 2400EX and was painted a two tone tan and brown color."
    Who were the beta testers and why the disguise?

    "This however was a limited proof build of only 10 units."
    OK, call it a proof build but in the industry they're known as prototypes. If the seller worked for Heathkit why not use industry standard terminology?

    Here's the rub, I've done plenty of R&D work and tested prototypes IN HOUSE so why a disguise if they never left the factory? Funny how in house there is plenty of lab standard test equipment calibration traceable to NIST which is the usual requirement to prove equipment meets FCC standards, if it isn't "government approved" the test results are invalid. So what can sending it out into the "real world" prove that lab equipment and a dummy load can't? If you were responsible would you put anything on the air that wasn't properly tested and certified first? If it puts out a load of hash mash and trash yo in a heap o' trouble boy! So why then send already tested and certified equipment out to prove what?

    The point is while some of the story makes perfect sense some of it smells a bit funny. It's a well known fact in political, propaganda and advertizing circles that if you mix known truth with lies the whole seems true. It's just sugar coating on a bitter pill, a technique used by the pharmaceutical industry every day. "Just a spoon full of sugar makes the medicine go down." Bottom line here for my 2c worth, there's something fishy in Vichy. Can't prove it so I won't try, just hooked on a feeling, high on believing.............

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