TREBLE BOOSTERS

ivan H said:
The two capacitors are RS high K (high stability) tubular ceramic "dogbone" types, an 0.005uf & an 0.01uf.
Click to expand...
As a substitute for those vintage high stability ceramic caps: What about the modern multi-layer ceramic chips (MLCC) with Class 1 or Class 2 specs?

Interesting article... even though most of it is way over my head:
product.tdk.com

High voltage MLCCs with C0G Characteristics and Replacement Solutions | Solution Guide | Tech Library | TDK Product Center

In recent years, there have been remarkable increases in withstand voltage and capacitance in MLCCs for temperature compensation. In particular, even in fields where film capacitors have traditionally been used, resonance circuits for example, replacement with MLCC is now possible.
product.tdk.com product.tdk.com
 
syscokid said:
As a substitute for those vintage high stability ceramic caps: What about the modern multi-layer ceramic chips (MLCC) with Class 1 or Class 2 specs?

Interesting article... even though most of it is way over my head:
product.tdk.com

High voltage MLCCs with C0G Characteristics and Replacement Solutions | Solution Guide | Tech Library | TDK Product Center

In recent years, there have been remarkable increases in withstand voltage and capacitance in MLCCs for temperature compensation. In particular, even in fields where film capacitors have traditionally been used, resonance circuits for example, replacement with MLCC is now possible.
product.tdk.com product.tdk.com
Click to expand...
I imagine they'd be fine. I didn't read the whole article, but the word "chip" makes me wonder if those particular type are surface mount caps. NPO/COG ceramics are considered the best type ceramics for audio use & can be found in many stompboxes.
I have used polystyrene caps in previous Rangemaster builds, again because of their stability. IIRC, Steve Daniels (Smallbear electronics) recommends these type caps in Rangemaster builds. Cheers
 
ivan H said:
I imagine they'd be fine. I didn't read the whole article, but the word "chip" makes me wonder if those particular type are surface mount caps. NPO/COG ceramics are considered the best type ceramics for audio use & can be found in many stompboxes.
Click to expand...
Example: KEMET, .01 uF, ceramic-radial-through hole, COG/NPO, 1% tolerance, 50v rated, low ESL, at $3.54 each from Digi-Key

Goldmax,-300.jpg
 
syscokid said:
… at $3.54 each from Digi-Key
Click to expand...
More info, just in case...: Order at least 10 of them, and the price drops about 80 cents each. "Downgrade" to a 2% tolerance, and the price drops an additional whole dollar... $1.90 each! Mouser is same price.

Or just get a cheapy ceramic for like 10 cents each, ha ha…

Would there be anything negative about adding a 100k bias trimmer pot in place of the 68k resistor of the Rangemaster circuit, just in case it's needed to get the desired voltages?
 
syscokid said:
Example: KEMET, .01 uF, ceramic-radial-through hole, COG/NPO, 1% tolerance, 50v rated, low ESL, at $3.54 each from Digi-Key

View attachment 37003
Click to expand...
syscokid said:
Would there be anything negative about adding a 100k bias trimmer pot in place of the 68k resistor of the Rangemaster circuit, just in case it's needed to get the desired voltages?
Click to expand...
It is the recommended method of getting a transistor that is a bit "off spec" to bias up properly, along with using a trimmer in place of the 3k9 emitter resistor. IIRC, it's not recommended to go below about 27k on the base resistor. Altering the value of the 68k does alter the input impedance & thus frequency response. A bit of deviation & you won't really hear a difference, but for a large deviation you "may" need to slightly adjust the input cap value to compensate.
One treble booster I build a good while back has a 1k or 2k resistor in series with a 5k pot in place of the 3k9 emitter resistor, allowing me to swap in different type transistors with ease, or make adjustments to compensate for radical temperatures (which we get here).
I'm pretty sure that the two CV7003 transistors you have on order will bias up just fine with the stock circuit values. I would test them on a breadboard or test circuit first to make sure. Cheers
 
Just got a Lovepedal BBB with "black glass" OC42. Fuzzface and Rangemaster in one housing, with controls for volume, gain and blend.
Full CCW is pure treble boost and full CW is pure FF.

Sounds great. A bit of treble boost adds crispness & cut to the fuzzface, which is germanium-warm in character.
Treble boost is nice too; not as flexible on its own as my Colour Boost since the shelf frequency is preset.

Will do more experimenting with blend settings in days to come.
But IMO it'd be worth the cost just for the brightened fuzz.
 
eclecticsynergy said:
Just got a Lovepedal BBB with "black glass" OC42. Fuzzface and Rangemaster in one housing, with controls for volume, gain and blend.
Full CCW is pure treble boost and full CW is pure FF.

Sounds great. A bit of treble boost adds crispness & cut to the fuzzface, which is germanium-warm in character.
Treble boost is nice too; not as flexible on its own as my Colour Boost since the shelf frequency is preset.

Will do more experimenting with blend settings in days to come.
But IMO it'd be worth the cost just for the brightened fuzz.
Click to expand...
PICS DAMMIT, PICS!!!!!
 
There's another one I need to acquire since I love the way it sounds and all the alternatives of the switch! Thanks for posting that. :cheers2:
 
syscokid said:
PICS DAMMIT, PICS!!!!!
Click to expand...
Compact MXR-type housing so I couldn't take a proper gut shot without unsoldering the jacks and taking board out. But the red dot OC42 is on the back; aluminum can protecting the fragile glass. According to Sean (maker of Lovepedals) this batch dates from 1st week of June, 1966.

Sorry for the fuzzy pic - my celphone doesn't do closeups well. (It isn't very good at normal shots either...)

1580246869558.jpeg

IMG_20200128_161519.jpg
 
Have played with it for awhile; really very nice indeed. FF side with a bit of treble boost is still my favorite setting.
But the TB side by itself adds a surprising amount of nice germanium grit, in addition to the extra push.

Combining these two circuits was a stroke of genius. Lovepedal has several different pedals with that combo, including the White Dragon fuzz and both Si and Ge versions of this BBB. The Kalamazoo OD has both pre-gain treble boost and a conventional post-gain tone control, useful features on a kick-ass pedal.
 
eclecticsynergy said:
But the TB side by itself adds a surprising amount of nice germanium grit, in addition to the extra push.
Click to expand...
Very eloquently said... :celebrate:

Sounds like you got a killer pedal. I like all the competition out there in the Pedal Effects World. It generates a lot of choices in high quality stuff from the inexpensive to the not-so inexpensive. I've never had the opportunity to play through any Love Pedal products, but judging by their great reputation and cult-like status, I'm not surprised by your comments, so far. Congrats... :flash:
 
I'm a big fan of Lovepedals, especially the drives. I have a number of 'em and there isn't a dud in the bunch.
The only one I hardly ever use is an analog ring/ghost-octave pedal, not because it isn't good but because I seldom want that effect.
I love his fuzzes and ODs, and the line has a couple of nice amplike character drives that make great foundation tones.
Great volume knob interaction is a hallmark of them all.
 
You must log in or register to reply here.
Back
Top