or Connect
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Crack;Bottlehead OTL
New Posts  All Forums:Forum Nav:

Crack;Bottlehead OTL - Page 324

post #4846 of 7977
Quote:
Originally Posted by Keithpgdrb View Post
 

whats a decent price for the Dale attenuator 100K

 

I can recommend this seller,

 

http://www.ebay.com/itm/Assembled-Dale-23-Step-Attenuator-Volume-Control-100k-/270311271326?pt=US_Amplifier_Parts_Components&hash=item3eefceab9e

 

Or the kit version if your a sucker for punishment,

 

http://www.ebay.com/itm/DIY-kit-Dale-23-Step-Attenuator-for-Volume-Control-100k-/280321499342?pt=US_Amplifier_Parts_Components&hash=item414476a0ce

post #4847 of 7977

What about this one: LINK

 

Looks like it might be using 1% resistors.

post #4848 of 7977

On the headphone section of the forum they have a topic called something like Grado Mods, where they pulled together all the various mods people have done and found work on the Grado headphones. Too bad we couldn't do something like that for the Crack amp. List the mod, the parts, where to get the parts, pictures of how to do the mod, all that. It would be helpful for people wanting to upgrade their amp. Let them maybe have some of the parts on hand as they build it so they could upgrade as they build in some cases.

post #4849 of 7977
Quote:
Originally Posted by ben_r_ View Post
 

What about this one: LINK

 

Looks like it might be using 1% resistors.

looks good to me.  anyone else?

post #4850 of 7977
Quote:
Originally Posted by HPiper View Post
 

 Let them maybe have some of the parts on hand as they build it so they could upgrade as they build in some cases.

Great idea. We will give them your email address for tech support.

post #4851 of 7977
Quote:
Originally Posted by Doc B. View Post
 

Great idea. We will give them your email address for tech support.


Do the people who are currently modding their kits call you for tech support? People adding all kinds of capacitors and different resistors that weren't in the original design call Bottlehead? Wouldn't really surprise me but I don't understand your comment. All the information is already out there it is just scattered all over the place. Maybe put a disclaimer in the documentation in BIG letters, "We do not offer tech support on any non-kit parts, or components." Actually that seems like a good idea to me.

post #4852 of 7977
Quote:
Originally Posted by Doc B. View Post

Great idea. We will give them your email address for tech support.
All you have to do is make a forum, state that you don't offer any support for various mods and let kind people at Bottlehead forum be helpful as they always are. I see no harm in that.
post #4853 of 7977
Quote:
Originally Posted by Doc B. View Post
 

Great idea. We will give them your email address for tech support.

 

Quote:

Originally Posted by .Sup View Post


All you have to do is make a forum, state that you don't offer any support for various mods and let kind people at Bottlehead forum be helpful as they always are. I see no harm in that.


Bottlehead already has a thriving forum where they talk about all kinds of things including upgrades and mods. But Ill admit that comment was a bit odd and I couldnt figure it out either.

post #4854 of 7977

If you have ever provided tech support to anyone that is unreasonable in their expectations or whose skill set preclude being successful in such activities, you will know from where Doc's comment arises. I am positive that Doc has had many such opportunities. Most folks are reasonable, but as a business entity Doc doesn't get to choose his customers.

post #4855 of 7977

will there be any harm in swapping 100 uF output caps with 70 uF ??

post #4856 of 7977


I ran mine with 47uf for a while and I know of one that runs 60uf pio. What type are you thinking of trying?

post #4857 of 7977

We are one of the few businesses that supports the notion of mods to our products. And yes, people call all the time, PM me at two different forums, and email with mod questions at a couple of different emails. That's great, we have created what we like to think of as a community that isn't scared to get inside stuff and find out what makes it tick. And the idea of a place that contains some organized documentation on mods is a fine idea too.

 

Please forgive the apparent impatience of my previous post. The reason for my response is the suggestion that people do an initial build of a kit with "upgrade" parts. Because of the volume of kits we sell and support we maintain the recommendation that our kits should be built as designed before being modified. That way we can effectively support the user if they have issues with their construction. Once it's up and running doing mods is great because it's a lot easier to sort if the mod doesn't work out. But if one has never soldered before and/or does not have enough experience to figure out the potential kinks created by performing a mod on their own it can save a lot of headache to build the kit stock and be sure it works before changing stuff. The skills that you acquire with the initial build will make future installation of your favorite mod go that much easier.

post #4858 of 7977
Quote:
Originally Posted by spacequeen7 View Post

will there be any harm in swapping 100 uF output caps with 70 uF ??

There is a relationship between the value of this capacitor and the bass roll off frequency. The lower the capacitor value the higher this frequency will be (within the limits of your hearing). I think that the impedance of your headphones also comes into play. I don't know the formula, but there is a calculator somewhere that works it out. A value of 100uF was chosen to produce a bass roll off at about 20 Hz I think.
Edited by MoatsArt - 5/6/14 at 3:21pm
post #4859 of 7977

There are some handy calculators on the v-cap site http://www.v-cap.com/tech.php there was also a chart posted on the old bh forum I'm not sure if it made the transition to the new site or was corrupted.

post #4860 of 7977
Quote:
Originally Posted by Doc B. View Post
 

We are one of the few businesses that supports the notion of mods to our products. And yes, people call all the time, PM me at two different forums, and email with mod questions at a couple of different emails. That's great, we have created what we like to think of as a community that isn't scared to get inside stuff and find out what makes it tick. And the idea of a place that contains some organized documentation on mods is a fine idea too.

 

Please forgive the apparent impatience of my previous post. The reason for my response is the suggestion that people do an initial build of a kit with "upgrade" parts. Because of the volume of kits we sell and support we maintain the recommendation that our kits should be built as designed before being modified. That way we can effectively support the user if they have issues with their construction. Once it's up and running doing mods is great because it's a lot easier to sort if the mod doesn't work out. But if one has never soldered before and/or does not have enough experience to figure out the potential kinks created by performing a mod on their own it can save a lot of headache to build the kit stock and be sure it works before changing stuff. The skills that you acquire with the initial build will make future installation of your favorite mod go that much easier.

 

Having started with the Crack and then working my way through the S.E.X. and the Mainline, I have to strongly endorse the idea of starting with the stock kit and then adding on later. Partly because it allows easier trouble-shooting, but also because I'm finding that I'm learning more now about the kits and the components from trying to decide what to modify and with which components. If I had been handed a package with all the pieces including modifications I never would have learned what I am now starting to understand. It's fine to build the kit by "joining the dots" because it would be too much to have to work it all out the first time, but starting with a known, working system allows for lots of fun and learning as you then research and upgrade to meet your specific needs.

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphone Amps (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Crack;Bottlehead OTL