Bottlehead Forum
General Category => General Discussion => Topic started by: adamct on July 29, 2013, 10:11:21 AM
-
Ugh. So bored at work, and there has been a total of maybe 5 posts all day long... :-\ Somebody post something! ;D
-
I'm rebuilding my modded Dynaco ST35 amp into a new box.
Kinda like this...
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi576.photobucket.com%2Falbums%2Fss207%2Fcorndog642%2F0821b75ddf5261ed7dc08d18a56aae90_zps7e9e7c6a.jpg&hash=b4fb88677c42d4bce8a89c02aefb51ef61386127)
-
Thanks! Too bad the system at my workplace won't let me see the picture... :(
-
Good lord, that's a little above my ability. Now will any of the wiring have to be rerouted because of the new box, or is it part for part, piece for piece? I was sorta thinking along the same lines for the Quickie.
-
Good lord, that's a little above my ability. Now will any of the wiring have to be rerouted because of the new box, or is it part for part, piece for piece? I was sorta thinking along the same lines for the Quickie.
It's pretty much my own layout. Here's what it used to look like.
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi576.photobucket.com%2Falbums%2Fss207%2Fcorndog642%2FDynaco%2520ST35%2FIMG_7465_zps4e68055d.jpg&hash=ca74d714c5255cc8dadc9e26af94c02c90b15c08)
Which was also my own layout. I wanted to do something different. I succeeded but over time I realized that I actually made it harder to deal with troubleshooting and/or making changes.
The new layout will be much easier to troubleshoot and tweak. There really isn't a lot of parts to these amps. It seems like there is but they're deceptively simple. I should be done building it hopefully later this week.
adamct - Sorry you can't see my pics. Maybe you can see this one. This is similar to my idea but a little different.
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fep.yimg.com%2Fca%2FI%2Ftriodeel_2268_68589643&hash=76bd8f506ad70ce5859fc9f40e43a51752e0822c)
-
Thanks, Rob! That one worked.
-
I've got to try my hand at breadboards. They are more logical to me and keep things neat.
-
I've got to try my hand at breadboards. They are more logical to me and keep things neat.
Can someone post a pic of the non-component side of a breadboard? I'm not clear on the proper way to wire up components. And my few attempts have ranged from ugly to disastrous.
Thanks
-
It's pretty much all point to point with some wires used for longer stretches.
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi576.photobucket.com%2Falbums%2Fss207%2Fcorndog642%2FDynaco%2520ST35%2F0db3f02d.jpg&hash=e1d0728db753be4945865d8ab7902cc0eb31ad7b)
In the next version I'm only using a pair of small bread boards for the negative feedback circuits. The rest will be mostly point to point.
-
Man I was thinking there was something wrong with the server!
-
I want to build one of these! Its killing me. Once I go part time. For sure..
-
I am also planning on a rebuild of the ST. 35. However, I will do something a little extreme, by using different tubes, and building mono blocks. I will be using 6SL7 & 6SN7 tubes in the front end, and 6V6 tubes in the output, and installing the new PCB's.
Bernie.
-
Funny, I always hear all these great things about the el84 tube. I was also thinking that maybe the bottlehead crew can design a simple but quality el84 amp to go with the quickie or something like that that can rival the st35.....just a thought...
-
We have been talking about it.
-
Am I on the same wavelength here or what?... Before, I posted, "what would be really cool to see is a DHT OTL reference pre amp". and Doc came back with , "we are already working on one"... and now, I ask about an el 84 amp, and Doc is "already discussing it"... I promise, I am not remote viewing or spying Doc... :)
-
Ok, I'm posting.
Why does the baby changing table in the Men's room have instructions in Braille? (Jim, please help me here) What do they say, "Clean, clean, clean. Turn baby boys over, you can't see it coming." Or something like that.
-
As the father of twin daughters, I assure you I didn't always see it coming with them either... ::)
-
I have no children just stories from good friends. I have never changed a diaper. But I help make them.
-
And then when your daughters grow up, you have to worry about this..... :) I shot this in a club in South East Asia. Apparently, they must have a problem with this sort of thing.... hahaha
-
This is totally unrelated, but I once went into a men's room that had a sign above the urinals:
"WARNING! Recycled water - not suitable for drinking!"
:-\ ::)
Really? When was the last time you saw a guy in the mens room using a straw to slurp out of the urinals?
-
I suppose riding a pogo stick in the women's restroom could be a little dangerous.
-
I just laughed out loud...my daughters are giving me strange looks... ;D
-
Having lived in Asia for many years, you don't even bat a lash at these signs. If they help those that need it, so be it!
-
Not my finest breadboard work, but it turned out ok...
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fcdn.head-fi.org%2F1%2F16%2F900x900px-LL-1678267f_IMG_5222.jpeg&hash=e857e7efb4ae01d6c4c9b2842105dd1a0cfcb041)
(power supply not installed yet, but it's just a simple TLE rail splitter with a couple caps.
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fcdn.head-fi.org%2F9%2F93%2F900x900px-LL-931c5348_IMG_5223.jpeg&hash=a1bf4c8e5134bb9d9348854c40c4818675da452d)
Yeah I know, some of those are pretty ugly joints. I went back and touched up most of them after the pic (as well as did a few that I missed the first time) and trimmed off those excess leads
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fcdn.head-fi.org%2F4%2F4e%2F900x900px-LL-4e326fbc_IMG_5229.jpeg&hash=12366f4328fe15e9c0505a4d39436fe221956900)
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fcdn.head-fi.org%2Fc%2Fc7%2F900x900px-LL-c75b9f3a_IMG_5219.JPG&hash=b43a6c50078f687384ac53da5540ed51314ff78d)
(the intended board layout was cleaner with everything running vertical or horizontal, but I goofed up midway and wound up jiggering things on the fly
This was a nutty headphone amp project that I cooked up to mimic Jan Meier's "active balanced ground" topology: http://www.meier-audio.homepage.t-online.de/grounds.htm
Three dual opamps were used. The first as an input buffer and where the bass boost switch is located. The other two for the output channels. I think I managed to squeeze in a gain switch somewhere in there too. My mistake, it was a switch for an output pad resistor.
-
Thanks, that gives me a place to start.
-
Adam,
I have never been so drunk that I drank from the urinal. Those hockey pucks in them would get in your way anyway.
-
Yeah, and not to mention taste terrible... And yeah Doc, A guy on a pogo stick is what that does look like... too funny!!......And not sure why he is trying to impress her so much, she has a "club" left leg.... :)
-
Those hockey pucks in them would get in your way anyway.
I hear they make great after dinner mints.
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Ffarm4.static.flickr.com%2F3521%2F3466147817_6a69563890.jpg&hash=db4638de696ecd41d4226432e5d333081a07b4fa)
-
That's just standard procedure after you've had your fill of the "artesian' water...
-
I never could figure out why some bathrooms have those fancy water fountains so low to the ground.
-
Ok, I'll post a random one:
I recently started a little bizarre, but healthy and harmless hobby: collecting driftwood for sculptures. Right now I'm hoping to make a large sculpture of an Orca whale probably for the backyard of our shop. Have collected the head, dorsal fin, tail, and some of the most important pieces to round out the body. Now needing to find pectoral fins, extra filler pieces, and some novel way of attaching it all together and elevating it off the ground. Debating whether I am up to the challenge to make this 10-12 ft. long scultpture "breach" or not.
Oh, the odd things we do to stay in shape :)
Cheers,
Clark
In other news, am making good headway on a new large bookshelf model to release soonish. Taking sea related name suggestions.
-
It has tempted me more than once to use a piece of driftwood somehow in a speaker design. Non conventional is great in trade for boxes, boxes, and more box-shaped pieces of audio gear.
-
The tough part of getting a driftwood speaker is getting the same piece of driftwood twice...
-
How about the "Blackfish", which is both sea-related AND Orca-related? ;)
-
Or the "Pilot", which keeps things whale-related...
-
Ummm, I still use mono.
-
Back to bread boarding. Has anyone else made their own phenolic eyelet board for use in a hifi? I have made a few for guitar amps and always thought it would make a nice clean build that would be easy to maintain.
-
In other news, am making good headway on a new large bookshelf model to release soonish. Taking sea related name suggestions.
Orcapocalypse
-
It has tempted me more than once to use a piece of driftwood somehow in a speaker design. Non conventional is great in trade for boxes, boxes, and more box-shaped pieces of audio gear.
I drive by this place that makes custom kitchen/bathroom countertops all the time, and I keep wondering if that would make a good panel to mount drivers onto. Or maybe find some surplus sinks or something and make pseudo horns out of them... or something. :o
-
I just finished building a pair of 13EM7 Miniblok amps. They sound great for a low investment.
-
Armaegis,
The countertop material, if it is a poured type might very well be a great baffle material with support. Corian was expensive back in the day, but there many more types of material now days. 1" thick would be a good start, with proper support as I mentioned. Also, you can go to places like the 'Restore' that Habitat for Humanity may have in your area. I have many materials for projects there.
-
I came across this article recopied on a hi fi blog and it's great for a laugh!
"I Married a Hi Fi Addict" by Alice Brooks for Audio magazine, Sept 1960
http://itishifi.blogspot.com/2013/07/i-married-hi-fi-addict-by-alice-brooks.html
(http://itishifi.blogspot.com/2013/07/i-married-hi-fi-addict-by-alice-brooks.html)
"The day finally came when the whole shebang came upstairs. It only took three men to get it up and they put the stair railing back when they finished, so it was relatively uneventful."
-
Ummm, I still use mono.
Definitely still listen to Mono music. I own more 78's than 33's... For RnD, Its a great way to evaluate incrimental changes in a system. Its very easy to compare changes that way.
How about the "Blackfish", which is both sea-related AND Orca-related? ;)
Adam, this should be a really good movie... https://www.facebook.com/BlackfishFilm (https://www.facebook.com/BlackfishFilm) I really like the name Blackfish for a speaker too. Thanks a ton for the suggestion!
-
Nothing wrong with mono - a lot of my favorite recordings aren't in stereo. Plus, the wood floors where I live are so damaging to my horn speakers imaging that I'm halfway ready to just shove the damn things next to each other, by a wall for better bass, and wire them in mono. It's not like I'm getting a realistic stereo image or "life like" soundstage anyway! Unless one is sitting still and equidistant from a pair of carefully-placed stereo speakers, I happen to think stereo is a bit overrated for casual loudspeaker use. Guess I'm more of a headphone guy.....
-
I will post, Dr. Amar Bose died on my birthday July 12.... My first stereo as a teenager was built around a pair of 901s with which I LOVED dearly and SERIOUSLY rocked both the west coast as well as the east coast of America for 15 years with those things.... A VERY fond memory... Thank you Amar for the huge amount of fun I had with your design and RIP.... Love the company or not, in the 1970s and early 80s, that company was putting out some FUN products... Nuff said... and note, I said the 1970s and early 80s ONLY....