2N5210 AF PREAMP/DRIVER NPN TO-92 50V TRANSISTOR

[talbany]

I ran across a 2N5210 AF PREAMP/DRIVER TRANSISTOR (at Mojotone) to use on my FET board.Has anyone tried using one of these. Any thoughts about using it instead of the usual UHF/VHF amplifier Dumble uses.
Looks promising
Thanks

Here is the Spec sheet

http://www.mouser.com/ds/2/149/2N5210-888419.pdf

Tony

[martin manning]

2N5210 is a BJT, not a J-FET like HAD used. You could certainly design an amplifier stage around that part, but it wold be a completely different circuit and it would not have the high input impedance of a FET. What's your goal here? Something easier to find and cheaper than the NTE parts? 2N4416A is what many people are using. They are current production and $6-$8 at Mouser. A MOSFET is another alternative, see http://www.muzique.com/schem/mosfet.htm. The BS170 used there is ~$0.50. It uses a 9V supply, which probably doesn't matter when the input is coming from a guitar (that could be changed, though... BS170 VDSS is 60V). PCB's and a tiny pre-assembled SMT version are available too. Other high impedance pedal boost circuits could be used, such as MXR Microamp. You can audition them in front of the normal input.

[talbany]

Martin
Thanks for the post!.I am not concerned about cost. However, I do think the FET circuit engaged in clean mode is a useable sound for me I am not a really a big fan of it when in OD mode!(especially using single coils) I am trying to find an alternative that sounds good in both modes and since the 2N5210 is designed for use as preamp might be better suited as a boost and thought I would ask if others had an opinion on this .I have used external pedals in the past with very good results (MXR micro/ RC boost/Boss CS1) all of which seem to work better IMO while in OD mode.This is the main reason why I have not gone with the FET in my amps in the past.I suppose I can put it on a relay and have it switched out when in OD mode and I may just have to go there
The Orman circuit looks promising.I may give that a shot.Thanks for the link.

BTW.I know there are others out there who like the sound of the FET in OD mode..Great! I don't

Thanks Again

Tony

[UltraHookedOnPhonix]

Hey Tony!

Have a look at Mouser part#: 512-BF256B

N-channel JFET @ $0.40 ea.

From a quick glance, it looks like it could work as a replacement for the 2N4416A with some minor tweaking.

[talbany]

Thanks Jonas

I think I am going to breadboard up a couple different ones up and see if any stand out!
Will add this one on my list

Thank You!
Tony

[mojotom]

I thought about designing a preamp based on a LND150, high voltage mosfet.
On the paper that mosfet has some nice features.

[martin manning]

I think I am going to breadboard up a couple different ones up and see if any stand out!

Sure, find your "desert island" boost and use that. The good news is that you can probably find a PCB at GGG, Mad Bean, BYOC, Aion, etc. Modules from BYOC's Crown Jewel system offer lots of possibilities, including an Armstrong compressor : https://buildyourownclone.com/collections/crown-jewel Aion has an Echoplex EP3 preamp board, which DSBeasley reports is a good alternative to the D-FET: https://aionelectronics.com/project/are ... p3-preamp/