chongmagic
Well-known member
Where is the best place to find BA482 diodes?
Bootleg Diodes
- Thread starter chongmagic
- Start date
K Pedals
Well-known member
Yeah I was wondering the same thing
BA482 Band-Switching Diode - QRPparts
BA482 Band-Switching Diode. Vr = 35V / If = 100mA / Vf = 1.2V / Cd = (f=1-100MHz@Vt=3V) 0.8-1.2pF / Rd = (f=200MHz@If=3mA) 0.6-0.7 Ohm. DO-34.
chongmagic
Well-known member
I did and used them in my build. They seemed legit, they do create a much softer clipping. I recommend putting in an on-off-on switch on this build as I like the sound better with just the opamp.
I'm building the moonshine v2 from pedalpcb... Bootleg its called... and its designed for a switch on/on to switch between low gain and high gain... so these switching diodes BA482 are for soft clipping part of the circuit... I wonder if another diode could be used in its place... I know there's 2 different BA482 DIODES the ones you have are New Jersey Semi and the other one is made by Phillips... Do you happen to know what diode jhs is using now. Because the pedals still in production... The NE5532A Op Amp I had to get surface mount to get that exact op amp.. and coversion pcb... Do you know a source to get the NE5532A op amp through-hole..... ☺?
chongmagic
Well-known member
I built this one, and have found that if I place the rocker of the on-on switch in between the top and bottom positions I like the sound the best, that is why I recommended trying the on-off-on switch.
I got the IC from Tayda I believe.
Tayda does not carry [it any longer. The NE5532A op amp doesn't even show up in there search I had to get the surface mount version and a pcb adapter from Cimarron Technology. The Moonshine v2 / Bootleg is modified Tube Screamer.. It's best used going into another pedal or dirty amp that why jhs put it his double pedals. In the Sweet Tea it's paired with the Angry Charlie and in the Double Barrel he has it paired with the Morning Glory..... I'm actually building a Sweet Tea v3 (Putting the Moonshine v2 and Angry Charlie v3 in a double pedal enclosure... Do you know if qrpparts.com is in the usa... The other company the has the Phillips BA482 is in France... Thanks..☺☺???
Robert
Reverse Engineer
I think you'd be just as well off with the NE5532P: https://www.taydaelectronics.com/ne5532-5532-ic-dual-low-noise-op-amp.html
I suspect the A suffix indicated SOP footprint, which is why you could only find it in SMD... I need to confirm this, and if so I'll remove the suffix from the build docs.
The build doc. Said NE5532A and I remembered getting the BC184 transistor from Tayda with a different letter after it BC184C and the whole pin out was wrong.. not reversed wrong.. one of the end pins was a center.. And I had to rebuy them from Small Bear and the pinout was right... So I found the NE5532A and it was a smd and they offered the adapter board with it... So I figure that had to be it and ordered it... I typed it in tbe search box on Tayda and nothing came up at all... but a different letter can mean somethings different....as with the BC184... How do you know the difference... Thanks..
Chuck D. Bones
Circuit Wizard
DigiKey has beau coup NE5532AP in stock.
https://www.digikey.com/product-detail/en/texas-instruments/NE5532AP/296-7040-5-ND/378263
https://www.digikey.com/product-detail/en/texas-instruments/NE5532AP/296-7040-5-ND/378263
jeffwhitfield
Well-known member
Hey folks, just a heads up for anyone looking to build this one. I just ordered all the parts for it, most of them from Tayda along with a few odd resistor and capacitor values from Mouser.
All three of the op-amps can be found on the Tayda site:
www.taydaelectronics.com
www.taydaelectronics.com
www.taydaelectronics.com
The main one that is the booger is the BA482 diode. You can get them from QRPparts:
qrpparts.com
However, they are overseas and it might take a while to arrive. There are a couple of alternatives that you can try though.
The NTE555A is said to be a direct replacement for the BA482:
I've also read that a 1N4148 diode sounds very, very similar to the BA482:
www.taydaelectronics.com
The BA482 is used for soft clipping so, technically, you can use just about any similar diode to achieve that. Best advice would be to socket the diodes so you can try out different combinations.
All three of the op-amps can be found on the Tayda site:
LM833N LM833 Dual Low Noise Audio Op-Amp IC
National - Get It Fast - Same Day Shipping
www.taydaelectronics.com
NE5532 5532 IC Dual Low Noise Op-Amp
VARIOUS - Get It Fast - Same Day Shipping
www.taydaelectronics.com
TC1044SCPA TC1044 Voltage Regulator IC
MICROCHIP - Get It Fast - Same Day Shipping
www.taydaelectronics.com
The main one that is the booger is the BA482 diode. You can get them from QRPparts:
BA482 Band-Switching Diode - QRPparts
BA482 Band-Switching Diode. Vr = 35V / If = 100mA / Vf = 1.2V / Cd = (f=1-100MHz@Vt=3V) 0.8-1.2pF / Rd = (f=200MHz@If=3mA) 0.6-0.7 Ohm. DO-34.
However, they are overseas and it might take a while to arrive. There are a couple of alternatives that you can try though.
The NTE555A is said to be a direct replacement for the BA482:
I've also read that a 1N4148 diode sounds very, very similar to the BA482:
1N4148 Switching Signal Diode
PHILIPS/NXP/ON SEMICONDUCTOR/TAK CHEONG - Get It Fast - Same Day Shipping
www.taydaelectronics.com
The BA482 is used for soft clipping so, technically, you can use just about any similar diode to achieve that. Best advice would be to socket the diodes so you can try out different combinations.
