Roender's FC-100 prototype and builder's thread - Page 15 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 12th February 2012, 10:25 PM   #141
diyAudio Member
 
Join Date: Jan 2006
Location: Las Vegas
Nice I would be very interested when these are finalized, I read up on the original FC-100 amp last year and put it on my to do list.
  Reply With Quote
Old 14th February 2012, 12:59 PM   #142
diyAudio Member
 
Join Date: Apr 2009
Send a message via MSN to chchyong89
Can you put my name in the list for a set when its done?

Regards
__________________
~.~
  Reply With Quote
Old 14th February 2012, 01:31 PM   #143
diyAudio Member
 
metal's Avatar
 
Join Date: Jan 2004
You can actually put your name here:

https://docs.google.com/spreadsheet/...xVUQ2clE#gid=0
  Reply With Quote
Old 14th February 2012, 02:32 PM   #144
diyAudio Member
 
Rudi_Ratlos's Avatar
 
Join Date: Jun 2009
Location: Hamburg / Germany
@chchyong89:

I have started doing the build today (see attached image) and will go on matching the small transistors (BC550C, BC560C, ...,
the HFe matching will be done using my DMM) and solder them tomorrow.

I have begun with the resistors, and as you can see: I am using standard metal resistors.
I will use "standard" components throughout this build, but I will use carefully matched input transistors (LSK170)
and closely (< 5% HFe, VBe) matched output transistors.

I will then try and prepare the heatsink.
This will be the biggest challenge for me: I am not a craftsman at all!

Take a look at this thread once a week or so.
This is no longer a "group-buy thread" currently.
I would like and call it: "My FC-100 prototype building blog".

If I succeed with this AMP (designed by Mihai, the PCB being layouted by METAL and me), this thread will contain
all the information necessary to do it yourself.

I will keep you informed about my progress.

Best regards - Rudi_Ratlos
Attached Images
File Type: jpg Joe 032.jpg (248.8 KB, 450 views)
  Reply With Quote
Old 14th February 2012, 03:27 PM   #145
diyAudio Member
 
Join Date: Apr 2009
Send a message via MSN to chchyong89
I have a small heatsink with height of 10cm, can I know the height/width of the board inclusive the NJL0302D installed?

edited
__________________
~.~

Last edited by chchyong89; 14th February 2012 at 03:45 PM.
  Reply With Quote
Old 14th February 2012, 08:44 PM   #146
DaveM is offline DaveM  United States
diyAudio Member
 
DaveM's Avatar
 
Join Date: Feb 2003
Location: Vermont
I would likely be game for building a prototype. I am fresh to this thread, so I will have some catch up reading to do. What are the specs for the needed transformer?
  Reply With Quote
Old 15th February 2012, 07:15 AM   #147
diyAudio Member
 
Rudi_Ratlos's Avatar
 
Join Date: Jun 2009
Location: Hamburg / Germany
@chchyong89:

The size of the heatsink needs to be bigger than 104 x 191 mm (see the attached image of the drill-master).
A heatsink with a height of 100 mm may be a little bit short.

I will use an old 100 mm heatsink for the prototype as well.
I will not yet use the heatsink shown in post #140; I have to obtain some experience drilling and mounting the transistors beneath the PCB first.

@Dave:

Mihai's FC-100 AMP needs a transformer with 2 x 25 VAC secondaries for the backend and a small transformer with 2 x 34 VAC secondaries for the frontend.
Mihai designed a shunt-regulator at +/-39 VDC to power the frontend.
I have layouted this shunt-regulator as well (shown in post #130), but I am still waiting for the prototype to be etched.

If you would like building a prototype as well: my offer #2 is still to have.

Best regards - Rudi
Attached Images
File Type: png Drillmaster.png (15.4 KB, 408 views)
  Reply With Quote
Old 15th February 2012, 10:24 AM   #148
diyAudio Member
 
Join Date: Apr 2009
Send a message via MSN to chchyong89
Quote:
Originally Posted by Rudi_Ratlos View Post
@chchyong89:

The size of the heatsink needs to be bigger than 104 x 191 mm (see the attached image of the drill-master).
A heatsink with a height of 100 mm may be a little bit short.

I will use an old 100 mm heatsink for the prototype as well.
I will not yet use the heatsink shown in post #140; I have to obtain some experience drilling and mounting the transistors beneath the PCB first.

Best regards - Rudi
Click the image to open in full size.

I found this casing from china website and it cost roughly 60usd. I love it very much but the size is very compact @ 220*85*300mm(inner). I wish to build this amplifier and fit into a small casing that can do everything for me without wasting space.

I think I will try to draw a PCB to fit into the case by using 1/8 resistors or 0805 SMD.
I have checked the Nover 10,000uF/63v and 1,000uF/63V, the diameter is relatively small at just 30mm and 16mm diameters respectively.

Hope Mihai would give me a permit to do that.
__________________
~.~

Last edited by chchyong89; 15th February 2012 at 10:29 AM.
  Reply With Quote
Old 15th February 2012, 04:43 PM   #149
diyAudio Member
 
meanman1964's Avatar
 
Join Date: Oct 2006
Location: Belgium the land of chocolate
Rudi,recieved the boards today.
  Reply With Quote
Old 15th February 2012, 09:39 PM   #150
diyAudio Member
 
Join Date: Jun 2004
Location: Singapore
Hi Rudi, paypal money sent for 2nd offer of the test board and components.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 10:18 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2