DC/DC stepup for valve projects

[SBD]

Hi,

Did anyone come across a DC/DC booster for tube projects? Something that will accept a 12VDC input with at least a 150VDC output (around 5mA).
Step down modules are readily available on ebay for generating 6.3V.

I would like to work with an off the shelf universal AC mains to 12VDC adapter for my guitar effects projects.

Thanks,
S.B.D

 

[trobbins]

Hi, did you do some searching? eg.
http://www.diyaudio.com/forums/tubes-valves/202151-12-volt-300-volt-inverter-question-tubes.html

 

[Merlinb]

They are quite popular for guitar effects circuits. There's a modest collection here:
Voltage Multipliers (for our tube projects...)

 

[Matt BH]

I have used this quite successfully for a few small valve pre amp type thingys:

NIXIE TUBE POWER SUPPLY MODULE FOR CLOCK 2 OUTPUTS | eBay

If you stick "nixie supply" into epay you will get a fair few different designs. The one I linked is nice because it uses a Maxim chip and has pretty good regulation. I don't think you could buy the parts and build one for less.

Cheers Matt.

 

[nigelwright7557]

I use back to back transformers to get high DC voltages.
i.e. I use a mains to 6vac for the heaters then also use the 6vac to drive reversed 9vac transformer to get high volts.

You can do this very cheaply with off the shelf transformers.

 

[kevinkr]

Here is a rather expensive option that can be adjusted over an output range of 95 - 210V and 50mA - 24mA max. (Note it is a 5W supply so as voltage goes up available current is decreased) It runs about $43 in single pieces.

R12-150B Recom Power | 945-2053-5-ND | DigiKey

It would help if the OP would add location information to his userid, that way members can steer him in an appropriate direction for his locale.

 

[12B4A]

Yet another option from Taylor edge, look at the HVPS link. I had one of these and it worked until I used it at a condition that was not listed in it's documentation (although your condition is documented). It also took a little while after payment before I received the part but that's not unheard of for hobby businesses.

 

[SBD]

Thanks for all the replays. I really like Matt B.H's link and will do an e-bay search for Nixie tube power supply. kevinr's module is also cool, I will order one on my next Digikey order.
although the switching frequencies are well out of the audio band, will more filtering be needed to avoid inter-modulations?

Thanks,
S.B.D

 

[jazbo8]

The cigarette lighter adapter shown in post #2 works just fine and is probably the least expensive solution short of DIY.

DIY from Jim Williams' classic AN.