GIRLS and their DIY projects

[pstamler]

[quote author="kiira"]wow thanks guys. this is the friendliest most encouraging place! I can't believe I spent all winter trying to rebuild a goofy hifi tube preamp. lol. I'm never gonna "mod" anything ever again - all I ended up keeping was the case for the dang thing and it still hums.[/quote]

Did you try adding heaps of capacitance to the two caps in the filament supply? I did a preamp that lifted a bunch of ideas from the Dyna PAS series, and it hummed too. I spent months looking for the problem, and finally, in desperation, changed those two filter caps for much bigger ones -- and the hum went away. Seems like Dyna's filament supplies only work with Dyna's own circuit boards.

Peace,
Paul

 

[kiira]

wow Hi Paul. I guess all the truly cool hang out here. On the modded pas I modded it again I replaced the ht power supply, the filiment sypply, the replacement phono board and the replacement line board. I gave "the last pre" phone board and ps to someone who needed a phono pre for sampling vinyl. prolly sounds better than a Vestax or Gemini.

I'm going to rebild my tube mic preamp with another line stage and all so maybe I'll troubleshoot then at the same time. I think I used 10kmF caps on the filiment supply because apexjr had a sale on them for like $1 or something.

Oh I never made your tube pre because I am afraid of the power supply boards I've never made any that complicated before and don't have stuff to do photo-resist etching.

thanks,

Kiira

 

[Flatpicker]

[quote author="kiira"]...Oh I never made your tube pre...[/quote]Tube pre? I know about the ss one you did for Recording mag, but I must have missed this one. Where can I find info?

 

[kiira]

[quote author="Flatpicker"][quote author="kiira"]...Oh I never made your tube pre...[/quote]Tube pre? I know about the ss one you did for Recording mag, but I must have missed this one. Where can I find info?[/quote]

It's in three issues of audioxpress. um... winter 2003 (I think). You can order back issues from them from their web site.

Kiira

 

[Flatpicker]

Thanks. Is this a mic pre or a hifi pre?

 

[kiira]

[quote author="Flatpicker"]Thanks. Is this a mic pre or a hifi pre?[/quote]

It's a mic pre using 6sn7 octals and a regulated power supply. There are several premutations included and Paul explained the design process in the article. audioxpress publishes hifi and studio diy stuff, SS and tube and speaker stuff too.

It's a pretty good magazine an I like it much better than the other one that was around Glass Audio the one where guys would write these 10 page articles on a tube design and a g'zillion maths formulas using Spice design and then they'd say they hadn't built it at all but it would sound really great if somebody did and then everyone would argue about the design for months in the letters section and no one would ever build it because it used negative feedback and no 300B tubes. Suck-O-Rama.

Kiira

 

[Flatpicker]

[quote author="kiira"]...It's a pretty good magazine an I like it much better than the other one that was around Glass Audio the one where guys would write these 10 page articles on a tube design and a g'zillion maths formulas using Spice design and then they'd say they hadn't built it at all but it would sound really great if somebody did and then everyone would argue about the design for months in the letters section and no one would ever build it because it used negative feedback and no 300B tubes. Suck-O-Rama.[/quote]ROTFL! Looks like we share the same sense of humor, lol. Thanks for the info. Now if I can only convince my wife that I need another magazine subscription...

 

[kiira]

[quote author="Flatpicker"]ROTFL! Looks like we share the same sense of humor, lol. Thanks for the info. Now if I can only convince my wife that I need another magazine subscription...[/quote]

LOL. That doesn't sound too hard. Buy her a nice present. I need to find a boyfriend who likes to make odd sized holes in metal enclosures. Someone with a machine shop perhaps...

Kiira

 

[Flatpicker]

[quote author="kiira"]I need to find a boyfriend who likes to make odd sized holes in metal enclosures. Someone with a machine shop perhaps..[/quote]Too funny! Anyone here have a machine shop?

 

[mikka]

How's the sound of your V-72 project.....are you happy?

 

[chrissugar]

[quote author="kiira"] I need to find a boyfriend who likes to make odd sized holes in metal enclosures. Someone with a machine shop perhaps...

Kiira[/quote]

Unbelievable... :grin:
Never heard something like this. Usually the priorities are money, house, car, etc.
:grin: :grin: :grin:

chrissugar

 

[CJ]

Girls, guys, DIY, what's the difference?
All equal here.
Don't ever say "Pretty good for a girl" That really pisses them off.
(learned that from old girlfriend)
I mean, some girls even ride Harleys! :razz:
Good thread, carry on.

 

[pstamler]

[quote author="kiira"][quote author="Flatpicker"][quote author="kiira"]...Oh I never made your tube pre...[/quote]Tube pre? I know about the ss one you did for Recording mag, but I must have missed this one. Where can I find info?[/quote]

It's in three issues of audioxpress. um... winter 2003 (I think). You can order back issues from them from their web site. [/quote]

Feb-March-April 2002; the article was called "Big Mike and the Jimmy". (I had to go look it up.)

One of these days, after I've finished laying out a solid-state supply board, I'll do a proper computerized layout of the supply regulators from that article and have some made for sale. I don't much like dealing with etching baths either, not to mention what you do with the etchant afterwards.

Welcome back, Kiira!

Peace,
Paul

 

[bcarso]

quote: "It's a pretty good magazine an I like it much better than the other one that was around Glass Audio..."

Actually audioXpress is just the amalgamation of Glass Audio, Speaker Builder, and Audio Electronics (the last formerly known as Audio Amateur).

Things just didn't allow Ed Dell to keep all three magazines going.

Brad

PS: welcome back kiira ;-)

 

[kiira]

[quote author="chrissugar"]Unbelievable... :grin:
Never heard something like this. Usually the priorities are money, house, car, etc.
:grin: :grin: :grin:

chrissugar[/quote]


Oh. Those too. I just have additional requirements.

Kiira

 

[kiira]

[quote author="pstamler"]

One of these days, after I've finished laying out a solid-state supply board, I'll do a proper computerized layout of the supply regulators from that article and have some made for sale. I don't much like dealing with etching baths either, not to mention what you do with the etchant afterwards.

Welcome back, Kiira!

Peace,
Paul[/quote]

Woo. that would rock Paul. I would be totally down for a set of boards. I was thinking of building it with a simple unregulated power supply just to see what it would sound like coz I have piles of 12sn7/6sn7 around. I have never made any complicated SS boards just hand drawn or pressy pad type stuff for tubes.

thanks,

Kiira

 

[Flatpicker]

[quote author="kiira"]...I would be totally down for a set of boards...[/quote]Me too!!! :green:

 

[smallbutfine]

Vikki:

The first channel worked straight off but i noticed the level kept going up and down, which turned out the chips weren't pushed fully home in their sockets i think i was frightened of breaking them. Every part was checked and double checked, resistors with an ohm meter.

Ha!
:razz:
Read this the first time now...late, i know.
Something like this happened to me "repairing" an spl vitalizer 2 weeks ago...
I bought it on ebay and the left channel didn't work from the beginning (no equalizing on it, just the stereo base widener).
I opened it and saw someone already tried to find cold solder joints on this channel (hah, he resoldered their "black box case" because he didnt find the fault and a burnt resistor left a black mark on the PCB after the psu-part for this channel - must have been a bad, bad short while "repairing" it)...
Such an ebay scam - ******* - man i hate such stuff, some kind of evil betrayal not to mention that...some people wouldn't even hear such a fault...fascinated by the stereo effect masking that.
I was so frustrated i didnt find the fault for two months, i decided to open it up the fifth time and after two hours i became that aggressive that i pushed everything on the board as hard as i could ( :evil: die, baby, die :twisted: ).... and what should i say?
It works flawlessly on both channels for the first time until now...
:grin:

I'm a little bit scaring about changing the opamps like in my highend mastering unit of that kind now...
:wink:

maybe a little bit OT i know...
:grin:

BTW: Women, your work is best diy stuff. Good to see our hobby is not a pure male domain !!!

 

[pstamler]

[quote author="Flatpicker"][quote author="kiira"]...I would be totally down for a set of boards...[/quote]Me too!!! :green:[/quote]

(Sigh) Guess I'd better mush in on the computer...

Peace,
Paul

 

[woodensoul]

[quote author="kiira"]I need to find a boyfriend who likes to make odd sized holes in metal enclosures. Someone with a machine shop perhaps...

Kiira[/quote]

Actually,... my kid brother is single and likes to build, cut, drill, machine and break things. He is going to help me build some enclosures for DIY.
:wink:

-Steve