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    Dynaco ST-70 "abortion" - photo

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    Bob Latino
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    Dynaco ST-70 "abortion" - photo

    Post by Bob Latino on Mon Feb 28, 2011 12:15 pm



    Sorry to rant here but sometimes I see online what I would consider a "Dynaco abortion". This is (what appears to be) a stock Dynaco ST-70 with an older GSI driver board. Now there is nothing wrong with removing the stereo/mono switch or maybe even drilling new holes for your input jacks but ....

    1. If you are going to do a complete rebuild at least repaint the transformers.

    2. If you are going to put in new tube sockets, at least have them all match. The one's on the front are the stock black tube sockets and the sockets on the chassis top are brown colored and are "top mount" rather than bottom mount like the front sockets.

    3. Don't have "resistor stacks" visible on the driver board top. If you want to use them place them on the bottom of the driver board. Hey - did you notice that the two bias adjusting pots on the sides of the driver board don't even match?

    4. Look at that "upgraded power supply" with wires and resistors hanging all over the place. If you are going to do this you probably could have squeezed them in INSIDE the amp. Yes - they were put in circular capacitor holders but there are no bolts holding the capacitors in place! If he ever shipped that amp, the UPS gorillas would probably see to it that those caps would most likely fall out of their circular holders.

    Sorry to rant, but it really pi$$es me off to see someone do this to an ST-70.

    Bob

    Captain Coconut

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    Re: Dynaco ST-70 "abortion" - photo

    Post by Captain Coconut on Mon Feb 28, 2011 1:25 pm

    This would be a tough sell to someone who requested pictures huh? If it were shipped to another country (and it was inspected by Customs) they might think that it was a bomb!




    I understand your feelings Bob; this is indeed sacrilege.


    Last edited by Captain Coconut on Mon Feb 28, 2011 4:04 pm; edited 1 time in total

    mantha3

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    Re: Dynaco ST-70 "abortion" - photo

    Post by mantha3 on Mon Feb 28, 2011 2:22 pm

    It looks like the person who did this had the goal of it being as messy and random as possible. The "upgraded power supply" has a zip tie thru the capacitor holder bolt on one side to hold on a smaller cap but on the other the zip tie just goes around the big cap to the smaller one. The off Bias pots.. White wire up against the sides of the tubes on the drive board. Looks like random tubes on the driver board too.. or the one front right is different from the other 3

    I think the person should have this taken away and serviced by the Dynaco Humaine Society... Give it a clean up and provide with a good home away from the abusive home it is in. affraid

















    Tube Nube

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    Re: Dynaco ST-70 "abortion" - photo

    Post by Tube Nube on Mon Feb 28, 2011 3:12 pm

    What's more, I think I can see 4 transistors on that board!

    A disgusting sight, all of it.

    Hey Bob, you might be able to use this photo on your site to promote your stuff. This being an example of what a clean, glistening, tidy, modern Dynakit is NOT!

    avi.inc

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    Re: Dynaco ST-70 "abortion" - photo

    Post by avi.inc on Mon Feb 28, 2011 3:31 pm

    What is those two silver pins on the left rear side.

    baddog1946

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    Re: Dynaco ST-70 "abortion" - photo

    Post by baddog1946 on Mon Feb 28, 2011 4:06 pm

    That's just nasty! No pride of workmanship there. Not to mention a lot of places to get a shock if you are not careful. Probably sounds like it looks. Frankenamp comes to mind.

    mantha3

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    Re: Dynaco ST-70 "abortion" - photo

    Post by mantha3 on Mon Feb 28, 2011 4:07 pm

    The rusty rods out the left rear are the new eye sore enhancers added to accentuate ugly

    Captain Coconut

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    Re: Dynaco ST-70 "abortion" - photo

    Post by Captain Coconut on Mon Feb 28, 2011 4:57 pm

    Those two rods sticking out the rear left are uranium rods. They power the amp. The capacitor bank is just eye candy! Laughing

    avi.inc

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    Re: Dynaco ST-70 "abortion" - photo

    Post by avi.inc on Mon Feb 28, 2011 5:32 pm

    Those two rods sticking out the rear left are to add just a bit of this or a tad of that to your sound? it gives you the ability to add bits of this and dashes of that, with continuously variable breadth and depth. How much would you pay for this flexibility? But wait. Before you answer that, there's also the ability to pan from here to there and if you lose your way, there's a switch to get you back again. And if you don't care for the spectral distribution of the difference between this and that, there is a special Rinkwitz Liley 4th grade crossover filter which may be used to control spectral harmony. The Sheen reduction processor included in the overwhelmingly complex circuitry reduces to a bare memory the graininess and shimmer present in many modern recordings digitally processed without the assistance of an inverse digital dither shield. Now how much would you pay? Yes Martha, there's more. More in the form of the rotary Ecstacy presence control at the far left hand side of the control panel. This knob can restore life to even the most nauseous recordings of the past. Don't dispose of those old bubble gum (or bubble machine) recordings taking up space in your library. Just enough of this or that to these legendary vinyl dinosaurs to make them worth the 9 styli you'll wear out playing just one of them. Now how much would you pay? Let us know.


    Last edited by avi.inc on Mon Feb 28, 2011 5:38 pm; edited 2 times in total (Reason for editing : (RANE) is just great!!)

    Tube Nube

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    Re: Dynaco ST-70 "abortion" - photo

    Post by Tube Nube on Mon Feb 28, 2011 5:32 pm

    Hah! Yeah, now that's a REAL "quad cap"!

    I wouldn't want to switch that thing on without protective eye wear. And a fire extinguisher near by.

    Luddite

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    Re: Dynaco ST-70 "abortion" - photo

    Post by Luddite on Mon Feb 28, 2011 5:42 pm

    I think I would even be too ashamed to use it as a "boat anchor". Laughing

    dynacophil

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    Re: Dynaco ST-70 "abortion" - photo

    Post by dynacophil on Mon Feb 28, 2011 5:43 pm

    is this the amp-pendant to a rat-bike?

    Luddite

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    Re: Dynaco ST-70 "abortion" - photo

    Post by Luddite on Mon Feb 28, 2011 5:51 pm

    Captain Coconut wrote: Those two rods sticking out the rear left are uranium rods. They power the amp. The capacitor bank is just eye candy! Laughing

    Actually, that's the "flux" capacitor. If you drag the amp behind a DeLorean at 88MPH during a lightning storm, it will disappear forever into the mists of time...a worthy fate for this pile of junk!

    bigmm79

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    Re: Dynaco ST-70 "abortion" - photo

    Post by bigmm79 on Mon Feb 28, 2011 8:00 pm

    My wife wouldn't let me near our house with that thing, let alone allow me to actually plug it in and turn it on. No I'd be lying though if I said I wouldn't take a chance to listen to that thing - in somebody else's place with somebody else's gear that is. It would be hilarious if it sounded awesome.

    DynakitParts
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    Weird Science

    Post by DynakitParts on Tue Mar 01, 2011 12:25 am


    What would David Hafler (RIP) think if he saw this?

    Kevin @ Dynakit

    Tube Nube

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    Re: Dynaco ST-70 "abortion" - photo

    Post by Tube Nube on Tue Mar 01, 2011 1:26 am

    So Kevin,

    You're denying it's one of your?

    ;-)

    Brenton

    DynakitParts
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    The Abortion Clinic

    Post by DynakitParts on Tue Mar 01, 2011 9:19 am


    Brenton,
    At first glance I thought this was a Curcio upgrade.

    This is sure getting everyone's attention...Thank Bob for posting this.

    I needed a few laughs.

    Kevin

    Tube Nube

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    Re: Dynaco ST-70 "abortion" - photo

    Post by Tube Nube on Tue Mar 01, 2011 11:31 am

    LOL!

    Bob Latino
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    Re: Dynaco ST-70 "abortion" - photo

    Post by Bob Latino on Tue Mar 01, 2011 9:47 pm

    Hi Kevin,

    Hafler would roll over in his grave if he saw this "audio abortion".

    Bob

    Tube Nube

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    Re: Dynaco ST-70 "abortion" - photo

    Post by Tube Nube on Wed Mar 02, 2011 2:01 pm

    By contrast, imagine the satisfaction he would or surely should feel to see his legacy carried forward and built upon, as it has been by the likes of Bob, Roy, Kevin, Joe and others.

    Sal

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    Re: Dynaco ST-70 "abortion" - photo

    Post by Sal on Wed Mar 02, 2011 7:44 pm

    Bob,
    How did you get a photo of my first ST-70 restoration? My 2nd one came out like this one below. You should have seen my 3rd ... Cool



    Sal

    Bob Latino
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    Re: Dynaco ST-70 "abortion" - photo

    Post by Bob Latino on Wed Mar 02, 2011 7:58 pm





    Nice work Sal! Now Dynaco "dudes" can see the difference between a rebuild by someone who knows what they are doing and one that was most likely "rebuilt" by a wino on New Year's Eve.

    Bob


    Corona

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    Re: Dynaco ST-70 "abortion" - photo

    Post by Corona on Thu Mar 03, 2011 12:24 am

    Hmmmm.
    Makes me feel better about the old grundig radio that I restored. I put new capacitors and wires all over the place. To be fair it actually sounds pretty good though.

    For all we know that amp could sound awesome and it was created by some audio genius Laughing

    Sal

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    Re: Dynaco ST-70 "abortion" - photo

    Post by Sal on Thu Mar 03, 2011 12:33 am

    Thanks Bob.

    I have another one of those total restorations coming to me by next week..

    Sal

    Captain Coconut

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    Re: Dynaco ST-70 "abortion" - photo

    Post by Captain Coconut on Fri Mar 04, 2011 1:00 pm

    Here's proof that the ST70 was built by a wino on New Year's Eve, as Bob had speculated. He saved his Glenfiddich canister and the water bottle container - he was dehydrated after the whiskey of course - and used them for his loudspeaker project. At least he had the presence of mind to recycle! Laughing




    Last edited by Captain Coconut on Fri Mar 04, 2011 3:09 pm; edited 1 time in total

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