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    my version of the ST120

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    my version of the ST120

    Post by Guest on Sat Oct 04, 2014 9:11 pm

    this is my updated chassis and panels of the ST120.
    The chassis is made by a guy in Bozeman who really does excellent work. If anyone is interested, 'pm' me and I'll give you his contact details.

     photo FDMKII4_zps22191f96.jpg

     photo FDMKII3_zpsbda30b5f.jpg

     photo FDMKII2_zps3419f461.jpg

    zx

    Posts : 194
    Join date : 2011-08-05

    Re: my version of the ST120

    Post by zx on Sun Oct 05, 2014 10:56 am

    Great look like all your amps an pres... wood sweet ....tone wise
    Can you give some input on the 6SN7 frontend sound?....
    an your input on the 12AU7-12BH7 frontend sound...

    thanks for the pic.........


    Thanks for the site Bob..................

    deepee99

    Posts : 1336
    Join date : 2012-05-23
    Location : Wallace, Idaho

    Re: my version of the ST120

    Post by deepee99 on Sun Oct 05, 2014 3:31 pm

    Stunning!

    sKiZo

    Posts : 1310
    Join date : 2013-04-01
    Location : Michigan USA

    Re: my version of the ST120

    Post by sKiZo on Sun Oct 05, 2014 5:43 pm

    Classic elegance ... but

    WHERE'S THE NUDIE SHOTS?? clown

    Guest
    Guest

    Re: my version of the ST120

    Post by Guest on Sun Oct 05, 2014 5:45 pm

    sKiZo wrote:Classic elegance ... but

    WHERE'S THE NUDIE SHOTS??  clown

    heck...ya gotta pay for those man!!!

    she's getting dressed or un dressed...whichever you prefer!!!!!!! What a Face

    Guest
    Guest

    Re: my version of the ST120

    Post by Guest on Sun Oct 05, 2014 5:47 pm

    zx wrote:Great look like all your amps an pres... wood sweet ....tone wise
    Can you give some input on the 6SN7 frontend sound?....
    an your input on the 12AU7-12BH7 frontend sound...

    thanks for the pic.........


    Thanks for the site Bob..................

    all I can say, to my ears, the 6SN7's sound fuller, so do the 12BH7, but I also like the 12AU7 or 5963's in the front end

    kaner

    Posts : 88
    Join date : 2011-09-20

    Re: my version of the ST120

    Post by kaner on Sun Oct 05, 2014 10:42 pm

    Those panels are spectacular! Who is your source? Did they make the top plate too?

    Guest
    Guest

    Re: my version of the ST120

    Post by Guest on Sun Oct 05, 2014 10:44 pm

    kaner wrote:Those panels are spectacular!  Who is your source?  Did they make the top plate too?

    thanks! I get FPE, Front Panel Express, to make all my panels. They also have a free design software, for both MAC and Windows, which I use to design the panels, really easy to use.

    sKiZo

    Posts : 1310
    Join date : 2013-04-01
    Location : Michigan USA

    Re: my version of the ST120

    Post by sKiZo on Mon Oct 06, 2014 12:18 am

    Another vote for FPE ... CNC machining is definitely the way to go for a professional looking result. The free design software DOES take a bit of practice, but I like being able to do "what if" changes on the fly. Here's my ST-120 chassis plate as ordered - I went through several versions before I was satisfied ...



    Once you've finalized the layout and selected the material, just click the buy button. In my case, I ordered the machining that would be either exposed after assembly or what would have been hard to cut here. I find that things like mounting holes for socket tabs, transformers and VTA boards, meters, etc. are easier to get right if you can put the parts in and mark the exact spots.

    mazeeff

    Posts : 122
    Join date : 2014-01-06
    Age : 61
    Location : Grand Rapids, Michigan, USA

    Re: my version of the ST120

    Post by mazeeff on Mon Oct 06, 2014 6:51 am

    I keep seeing "Free Design Software" with FPE, but what would such a panel cost to fabricate? I might want to try one in the future. And by the way, MontanaWay, your workmanship, and attention to detail is nothing short of fantastic!

    Mike

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    Guest

    Re: my version of the ST120

    Post by Guest on Mon Oct 06, 2014 10:30 am

    mazeeff wrote:I keep seeing "Free Design Software" with FPE, but what would such a panel cost to fabricate? I might want to try one in the future. And by the way, MontanaWay, your workmanship, and attention to detail is nothing short of fantastic!

    Mike

    its a bit like asking how long is a piece of string, it really depends so much on the size and complexity. A top panel for my ST120 version costs about $125. It falls into the category of not super expensive but not really cheap either. I find FPE's quality to be excellent, so far have not had issues. I have used another manufacturer based in CA, who are about 15-20% cheaper than FPE, BUT, I've had so many issues with them in the end that saving made no difference at all!

    sKiZo

    Posts : 1310
    Join date : 2013-04-01
    Location : Michigan USA

    Re: my version of the ST120

    Post by sKiZo on Mon Oct 06, 2014 3:09 pm

    Yes ... it does cost, so you have to figure out whether it's worth it ...

    That said, there's no way I would have been able to get this quality of workmanship hacking away at a slab of metal in the garage.



    Total cost for the panels around $160, including the printing. Hey, you only live once ... clown

    Guest
    Guest

    Re: my version of the ST120

    Post by Guest on Mon Oct 06, 2014 5:21 pm

    here's the inside of the ST120....its a busy little place!!

     photo FDINS_zps7d37b567.jpg

    mazeeff

    Posts : 122
    Join date : 2014-01-06
    Age : 61
    Location : Grand Rapids, Michigan, USA

    Re: my version of the ST120

    Post by mazeeff on Tue Oct 07, 2014 8:02 am

    Can you describe the boards that we are looking at? One must be for driving the VU meters, but what is the red board (with transformer)? I really like those mini-fans that you are using. Are you pushing or pulling air from the chassis? I noticed air vents next to the fan.  Does this prevent the air from getting pulled through the tube vent holes? Your attention to detail in the undercarriage is stunning!!! The Octopus ground lug is a nice touch!

    Mike

    arledgsc

    Posts : 340
    Join date : 2012-11-30
    Location : SF Bay CA

    Re: my version of the ST120

    Post by arledgsc on Tue Oct 07, 2014 10:11 am

    Beautiful !! The extra room is very nice!

    Guest
    Guest

    Re: my version of the ST120

    Post by Guest on Tue Oct 07, 2014 10:45 am

    mazeeff wrote:Can you describe the boards that we are looking at? One must be for driving the VU meters, but what is the red board (with transformer)? I really like those mini-fans that you are using. Are you pushing or pulling air from the chassis? I noticed air vents next to the fan.  Does this prevent the air from getting pulled through the tube vent holes? Your attention to detail in the undercarriage is stunning!!! The Octopus ground lug is a nice touch!

    Mike

    yes, the large pcb is the VTA octal driver board, on the left, one is the VU meter driver pcb, the red pcb is the mini transformer for the VU & mini fan supply pcb, the pcb with the grenn LED on is the time delay unit, and the vero board is the variable power supply to drive the mini fan.
    Why variable power supply you ask?...glad you did! Smile The mini fans are rated at 12VDC and are supposed to be quiet...well they are not quiet enough for my liking, so I use a small variable power supply based on the LM317 to cut the supply down below 10VDC, at which stage the fan is quiet enough.
    I am using the fan to push ambient air into the chassis to aid in the convection effect the hot tubes create as they pull air up through the vent holes. Probably not really necessary, but I feel better for it and you can actually feel air moving through those vent holes.
    Yes, I found that two grounding lugs are just not enough, so I use a bunch of 'Y' grounding lugs and arrange them in 'petal' form, much easier and neater!
    Thanks for the positive comments Smile

    Maintarget

    Posts : 209
    Join date : 2013-02-10

    Re: my version of the ST120

    Post by Maintarget on Tue Oct 07, 2014 6:07 pm

    Really admire the attention to detail and quality craftsmanship, thanks for sharing the under hood pic's!

    sKiZo

    Posts : 1310
    Join date : 2013-04-01
    Location : Michigan USA

    Re: my version of the ST120

    Post by sKiZo on Tue Oct 07, 2014 6:59 pm

    Don't I get a hug for making him post the nudie pic? Sad

    I appreciate that this build was identified as an ST-120. Not much resemblance to a REAL ST-120 ... don't know about people just can't leave well enough alone! jocolor

    With all the extra digital hardware under the hood, (and no noise I assUme?) I'm half tempted to dig out that 24v power supply I was gonna install to light the on/off switch ... maybe even light the meters ... and put some sound active LEDs underneath to pulse with the music ...

    Somebody stops me!

    Maintarget

    Posts : 209
    Join date : 2013-02-10

    Re: my version of the ST120

    Post by Maintarget on Tue Oct 07, 2014 8:04 pm

    sKiZo is you're middle name agitator Very Happy 
    I always look forward to the usual suspects (You know who you are bounce ) and your posts!

    deepee99

    Posts : 1336
    Join date : 2012-05-23
    Location : Wallace, Idaho

    Re: my version of the ST120

    Post by deepee99 on Tue Oct 07, 2014 11:30 pm

    Why don't we all switch to ham radio and dump all this audio crap?

    Guest
    Guest

    Re: my version of the ST120

    Post by Guest on Wed Oct 08, 2014 10:00 am

    sKiZo wrote:Don't I get a hug for making him post the nudie pic?  Sad

    I appreciate that this build was identified as an ST-120. Not much resemblance to a REAL ST-120 ... don't know about people just can't leave well enough alone! jocolor

    With all the extra digital hardware under the hood, (and no noise I assUme?) I'm half tempted to dig out that 24v power supply I was gonna install to light the on/off switch ... maybe even light the meters ... and put some sound active LEDs underneath to pulse with the music ...

    Somebody stops me!

    digital hardware?????HUH!....wash your mouth out with soap and water mister!!!!! Twisted Evil ....there are no 1's and 0's in this baby!
    oh...no noise...since everything is ANALOG!!!!! What a Face


    Last edited by MontanaWay on Wed Oct 08, 2014 11:03 am; edited 1 time in total

    Guest
    Guest

    Re: my version of the ST120

    Post by Guest on Wed Oct 08, 2014 10:00 am

    deepee99 wrote:Why don't we all switch to ham radio and dump all this audio crap?

    10-4 good buddy.................. bounce

    dougmon

    Posts : 65
    Join date : 2013-11-04
    Age : 60

    Re: my version of the ST120

    Post by dougmon on Wed Oct 08, 2014 12:19 pm

    MontanaWay wrote:
    deepee99 wrote:Why don't we all switch to ham radio and dump all this audio crap?

    10-4 good buddy.................. bounce

    That's just crazy.

    Besides, I'm only about a year away from transferring all of my CDs to 78s one song at a time....the Victrola rules!

    sKiZo

    Posts : 1310
    Join date : 2013-04-01
    Location : Michigan USA

    Re: my version of the ST120

    Post by sKiZo on Wed Oct 08, 2014 4:10 pm

    10-4 good buddy? That's CBer talk and not welcome on the ham bands.

    Main difference between a hammer and CBer? An agitated hammer will remark on someone's resemblance to the posterior portions of a member of the genus Equus in the family Equidae, where a CBer will just call them a horse's ass ...  clown

    MontanaWay wrote:digital hardware?????HUH!....wash your mouth out with soap and water mister!!!!! Twisted Evil ....there are no 1's and 0's in this baby!
    oh...no noise...since everything is ANALOG!!!!! What a Face

    I see what looks to be a suspicious amount of silicon in there, and if that ain't 1's and 0's, I'll eat my hat!

    (I better run down to the bakery and order up a frosted double chocolate hat just in case you decide to take me up on that. rabbit

    Reason I mentioned noise is it's not uncommon to get some crosstalk between silicon in close proximity to old school line level components. If that happens, usually as simple as adding a metal divider (similar to what you'd see in a tuner) to keep the circuits from interacting.

    On that power supply for accessory circuits ... this one taps out for 24v and 12v. I went as far as making the mounting plate and evarthang, then decided against it.


    Guest
    Guest

    Re: my version of the ST120

    Post by Guest on Wed Oct 08, 2014 10:01 pm

    sKiZo wrote:10-4 good buddy? That's CBer talk and not welcome on the ham bands.

    Main difference between a hammer and CBer? An agitated hammer will remark on someone's resemblance to the posterior portions of a member of the genus Equus in the family Equidae, where a CBer will just call them a horse's ass ...  clown

    MontanaWay wrote:digital hardware?????HUH!....wash your mouth out with soap and water mister!!!!! Twisted Evil ....there are no 1's and 0's in this baby!
    oh...no noise...since everything is ANALOG!!!!! What a Face

    I see what looks to be a suspicious amount of silicon in there, and if that ain't 1's and 0's, I'll eat my hat!

    (I better run down to the bakery and order up a frosted double chocolate hat just in case you decide to take me up on that. rabbit

    Reason I mentioned noise is it's not uncommon to get some crosstalk between silicon in close proximity to old school line level components. If that happens, usually as simple as adding a metal divider (similar to what you'd see in a tuner) to keep the circuits from interacting.

    On that power supply for accessory circuits ... this one taps out for 24v and 12v. I went as far as making the mounting plate and evarthang, then decided against it.


    silicon yes...but all analog....no gates 'n such things...all nice uuuup and then doooown.....so no 1's and 0's cheers

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