Search found 182 matches

by BJF
04 Jun 2017, 09:10
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor Sweet Honey Overdrive [traced]
Replies: 124
Views: 58086

Re: Mad Professor Sweet Honey Overdrive [traced]

Build a Baby Pink Booster and you're all set. Hi there, Oh actually the BJF design Sweet Honey dlx does not hold a separate boost circuit but it instead holds a number of controls for parameters within the basic circuit and so you can with the dlx version control bass middle and treble but really i...
by BJF
04 Jun 2017, 08:48
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor 1
Replies: 40
Views: 10538

Re: Mad Professor 1

Hi there, I can say this, that if you read the product text it says the circuit has two overdrive stages. MP was not keen on my designing a circuit like this from ground up….though I might have preferred to, but they preferred I’d use building blocks from proven designs I had made. The circuit uses ...
by BJF
14 Feb 2017, 22:06
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Origin of the Ibanez TS-808 Tubescreamer?
Replies: 69
Views: 38771

Re: Origin of the Ibanez TS-808 Tubescreamer?

Hi there, Yes as I said an interesting side story and it could really spur a few thoughts As I said it was a heavy sales argument that these were made by the former designer of BOSS… At the time you could get a way with somethings at Frankfurt which you couldn’t pull off today… It is also so that if...
by BJF
13 Feb 2017, 14:44
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Origin of the Ibanez TS-808 Tubescreamer?
Replies: 69
Views: 38771

Re: Origin of the Ibanez TS-808 Tubescreamer?

Hi, Yes Dirk, you are most right, single pole switching was the thing of the day then. So yes these Ibanez/Maxon definitely had the single pole switching.I guess it slipped my mind since I changed the switching to true bypass on the OD II I mentioned above and I actually had that unit in for service...
by BJF
09 Feb 2017, 15:31
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Origin of the Ibanez TS-808 Tubescreamer?
Replies: 69
Views: 38771

Re: Origin of the Ibanez TS-808 Tubescreamer?

Hi there, As i recall Ibanez/Maxon had in the mid 70’s an orange pedal called Overdrive, while that was basically a Big Muff, and then a green pedal called Overdrive II that was version of MXR Distortion + albeit the OD II had after the distortion a boost cut Treble control the type you’d see in gra...
by BJF
02 Feb 2017, 04:31
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor Sweet Honey Overdrive [traced]
Replies: 124
Views: 58086

Re: Mad Professor Sweet Honey Overdrive [gutshots] [traced]

I am wondering if C1 is really only 4n7, simply because the BJF - Honey Bee uses a 47n in this position. analogguru HI there, Yes it does and the reason is this while devoloping this model for MP and in a form that they actually could make at any scale there just happened to come to my workshop a g...
by BJF
29 Jan 2017, 08:24
Forum: Pedal Debugging & Troubleshooting Support
Topic: Bsiab Transistors
Replies: 7
Views: 206

Re: Bsiab Transistors

What about BF245C? Hi there, Try BF245A which is fairly close to 2N5457 The suffix on this type and other European J Fets gives the IDSS range and divides that into groups where A has the lowest IDSS and D highest. At your service BJ BJF Electronics Sweden I can choose from the following options: B...
by BJF
28 Jan 2017, 23:15
Forum: Pedal Debugging & Troubleshooting Support
Topic: Bsiab Transistors
Replies: 7
Views: 206

Re: Bsiab Transistors

POTL wrote:What about BF245C?
Hi there,

Try BF245A which is fairly close to 2N5457

The suffix on this type and other European J Fets gives the IDSS range and divides that into groups where A has the lowest IDSS and D highest.

At your service
BJ
BJF Electronics
Sweden
by BJF
25 Oct 2016, 15:00
Forum: Boutique Stompboxes dissected...
Topic: BJFE - Emerald Green Distortion Machine [traced]
Replies: 85
Views: 30941

Re: BJFE - Emerald Green Distortion Machine [traced]

Hi There, Oh that schematic doesn't flow well at all. Really it's a straight forward design and as I wrote several years ago that if you'd take a BJF EGDM apart you would find three transistors Indeed BJF version is all silicon while when I was making this for Bearfoot and seeing they had 2N1308's i...
by BJF
10 Oct 2016, 22:25
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor Sky Blue Overdrive [traced]
Replies: 70
Views: 29567

Re: Mad Professor Sky Blue Overdrive [traced]

Hi there,

"Tag knows Tone"

Have fun
BJ
by BJF
10 Oct 2016, 22:22
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor - Royal Blue Overdrive
Replies: 11
Views: 4593

Re: Mad Professor - Royal Blue Overdrive

Hi there,

Actually I was wondering about the correct spelling of blah for the press release of my latest Fuzz:
It sounds like blah and behaves like blah, when you blah it. :hmmm:

Oh I'd be sure someone will do the honours with perfboard :thumbsup

Have fun
BJ
BJFElectronics
Sweden
by BJF
10 Oct 2016, 22:17
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor - Amber Drive [traced]
Replies: 25
Views: 11985

Re: Mad Professor - Amber Drive [traced]

yesterday i gave it another try. :horsey: with a fine sawblade and stanley knife i cleaned op all the space between the copper lanes, and heyyyy it worked :thumbsup but than i noticed that when the sustain was turned down complete, volume on max there was a volume loss in compare with the volume of...
by BJF
07 Oct 2016, 19:15
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor - Amber Drive [traced]
Replies: 25
Views: 11985

Re: Mad Professor - Amber Drive [traced]

Hi there, Transistor should be faced according to data sheet and gate should rest at 0V (because there should be no current flowing through or if there is the transistor converts to a diode.) Your measurement suggests that the transistor either is shorted or drawing too much current as in IDSS or UP...
by BJF
05 Oct 2016, 00:46
Forum: Boutique Stompboxes dissected...
Topic: BluesPearl - BlueBalls [traced]
Replies: 8
Views: 3049

Re: BluesPearl - BlueBalls [traced]

Hi there,

Thanks The Rotagilla! for both posts

I was going to say it might appear a daring buy with Bluespearl.......

Ahum

Have fun
BJ
BJF Electronics
Sweden
by BJF
03 Oct 2016, 03:30
Forum: Boutique Stompboxes dissected...
Topic: BluesPearl - BlueBalls [traced]
Replies: 8
Views: 3049

Re: BluesPearl - BlueBalls [traced]

Hi There,

just curious is that the Blues Pearl of the same company that made amplifiers cirka 2001?

Thanks
BJ
by BJF
03 Oct 2016, 03:28
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor - Amber Drive [traced]
Replies: 25
Views: 11985

Re: Mad Professor - Amber Drive [traced]

Hi there, You might want to check the last J FET and that it has enough Drain-Source voltage..... At your service BJ BJF Electronics Sweden in this topic https://www.freestompboxes.org/viewtopic.php?f=73&t=27892 another member pointed out that i had put the most right elco 1 uF +/- wrong. i have co...
by BJF
03 Oct 2016, 03:22
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor - Royal Blue Overdrive
Replies: 11
Views: 4593

Re: Mad Professor - Royal Blue Overdrive

Hi There James, 1) if you wish- actually using limiting diodes in the feedback loop is much older than that ;) 2) yes and that one is to limit the HiFi treble-sadly at my age or from rocking too hard in my leathers as it says on the internetz I no longer hear these super sonic frequencies but I know...
by BJF
25 Sep 2016, 21:38
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor - Amber Drive [traced]
Replies: 25
Views: 11985

Re: Mad Professor - Amber Drive [traced]

Hi there,
You might want to check the last J FET and that it has enough Drain-Source voltage.....

At your service
BJ
BJF Electronics
Sweden
by BJF
25 Sep 2016, 21:36
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor - Electric Blue Chorus
Replies: 20
Views: 9648

Re: Mad Professor - Electric Blue Chorus

I'd guess to see how you implemented the compander with PT2399. That is the thing that i haven't seen done too many times. +m Hi there, Oh how to implement an NE570 would be fairly standard ( while there are tricks one can use it’d be a bit beyond for the intended use). That is too say there’s noth...
by BJF
27 Jul 2016, 16:16
Forum: Boutique Stompboxes dissected...
Topic: Mad Professor - Simble [traced]
Replies: 55
Views: 23549

Re: Mad Professor Simble [traced]

Hi There, Indeed this is a a Lassi Ukkonen design and in that it is a Simble and not really a Mad Professor pedal. I'd say I know nothing of this pedal other than I have played one- Simble.com would not share the schematic with the designer of MP Amplifications So this is a major non understanding i...