Greg Fryer - Treble Booster Deluxe (Guts + Schem)
I couldn't resist the temptation and opened the little bugger minutes after trying it. I was expecting goop but to my surprise it was clean so here are some pics (click to enlarge)
It's a single transistor design based on one that has been floating around for god knows how long. I built one of those with a 2n3904 so I did a bit of comparison and found that I prefer mine but that's just my opinion. The Fryer unit has more gain which may have to do with the higher hfe of the BC239. it also has some more bass due to the bigger input cap. But other than that they are pretty much the same thing.
The only thing I just couldn't get was the value of the ceramics (C8 & C9). I believe they are 10p but it's really hard to read the inscription.
Here's the schematic:
It's a single transistor design based on one that has been floating around for god knows how long. I built one of those with a 2n3904 so I did a bit of comparison and found that I prefer mine but that's just my opinion. The Fryer unit has more gain which may have to do with the higher hfe of the BC239. it also has some more bass due to the bigger input cap. But other than that they are pretty much the same thing.
The only thing I just couldn't get was the value of the ceramics (C8 & C9). I believe they are 10p but it's really hard to read the inscription.
Here's the schematic:
- Attachments
-
- TBD Schematic.png (9.77 KiB) Viewed 3825 times
- tube-exorcist
- Resistor Ronker
No, absolutely not. Its the different value of R5 (2k2 vs 2k4) and probaably the bigger input cap.The Fryer unit has more gain which may have to do with the higher hfe of the BC239.
"I've noticed there's an inverse relationship between cost of gear and talent. If you need the most expensive gear to get decent tones, then you suck as a player."
You are right, since the emitter is fully bypassed at "high" frequencies decreasing R5 would indeed boost the lows somewhat. Sorry about that, I didn't noticed that change on the schematic. Either way you didn't have to be that aggressive about it now did you?tube-exorcist wrote:No, absolutely not. Its the different value of R5 (2k2 vs 2k4) and probaably the bigger input cap.
On the other hand my unit has a 10k pot in the collector and a 2k4 emitter resistor.
- mirosol
- Resistor Ronker
Drew up a layout. Currently unverified.
May be a good idea to try adding a volume pot to the output... :)
May be a good idea to try adding a volume pot to the output... :)
http://tagboardeffects.blogspot.com/
http://mirosol.kapsi.fi/
"No such thing as innocence" -Iron Chic
http://mirosol.kapsi.fi/
"No such thing as innocence" -Iron Chic
- reneshelle
- Solder Soldier
No volume knob allowed, and no on/off switch either. Because then it would be a Treble Booster Deluxe Deluxe, and that just sounds silly...
- mirosol
- Resistor Ronker
Just came by to say that the layout above is now verified by one of our blog readers.
http://tagboardeffects.blogspot.com/
http://mirosol.kapsi.fi/
"No such thing as innocence" -Iron Chic
http://mirosol.kapsi.fi/
"No such thing as innocence" -Iron Chic
- mictester
- Old Solderhand
Information
Nope - the overall gain is determined by the ratio of the collector resistor to the emitter resistor. Gain is (roughly) Re so you can easily change the basic gain of the thing. The ceramic capacitors will be more likely to be 100pF or even bigger - 10pF wouldn't do anything.Gonzo wrote:The Fryer unit has more gain which may have to do with the higher hfe of the BC239.
"Why is it humming?" "Because it doesn't know the words!"
- mictester
- Old Solderhand
Information
102 = 1nFMbas974 wrote:There are NO values for C8 and C9 in the schem. While on vero they are 10p each.... is it ok ?
Ceramic cap is 102 = 1n ?
C8 and C9 are probably 100pF (or bigger).
"Why is it humming?" "Because it doesn't know the words!"
- danielzink
- Resistor Ronker
Information
- Posts: 389
- Joined: 23 Feb 2008, 19:27
- Completed builds: Too many: www.danielzink.com
- Location: Lansing, MI
- Has thanked: 8 times
- Been thanked: 27 times
freq67 wrote:That layout is incomplete there are no pots and no swtch!!???!!!
You're joking right ?
If not....
#1. The pedal HAS NO pots. Please note the images in the OP.
#2. You have your in and out clearly marked - that's all that's all you need. From there use your favorite switch wiring configuration and go.
http://www.danielzink.com
MoonWatcher wrote: Silent ain't better. If someone cracks the shitwind, I want to know what's headed my way. Silence is for the library and the cemetery.
- freq67
- Solder Soldier
danielzink wrote:freq67 wrote:That layout is incomplete there are no pots and no swtch!!???!!!
You're joking right ?
If not....
#1. The pedal HAS NO pots. Please note the images in the OP.
#2. You have your in and out clearly marked - that's all that's all you need. From there use your favorite switch wiring configuration and go.
What do you think about this two Brian May TB schemes?
http://www.uk-electronic.de/Download/Ma ... ooster.pdf
http://pedalparts.co.uk/wp-content/uplo ... 6/BMTB.pdf
http://www.uk-electronic.de/Download/Ma ... ooster.pdf
http://pedalparts.co.uk/wp-content/uplo ... 6/BMTB.pdf
Excellent post!
I'm guessing the blue resistors are metal film and the beige ones are carbon film???
I've seen that Greg Fryer uses metal film, carbon film and carbon composite resistors in his AC30 rebuilds.
Is this done for some sort of 'tone improvement' reason?
I'm guessing the blue resistors are metal film and the beige ones are carbon film???
I've seen that Greg Fryer uses metal film, carbon film and carbon composite resistors in his AC30 rebuilds.
Is this done for some sort of 'tone improvement' reason?
- mmolteratx
- Degoop Doctor
Ridiculous mojo reasons.JDub42 wrote:Excellent post!
I'm guessing the blue resistors are metal film and the beige ones are carbon film???
I've seen that Greg Fryer uses metal film, carbon film and carbon composite resistors in his AC30 rebuilds.
Is this done for some sort of 'tone improvement' reason?