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TT VPump - Voltage Converter

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Description

The TT VPUMP kit is a very effective working voltage converter which generates an output voltage of 90 V DC to 220 V DC from a 12V DC input voltage.
The circuit is in use for many years now and it is proven. In this kit the circuit has been adapted to a compact size and optimized for use in small preamplifier chassis. So it is an ideal HV power supply for tube stompboxes and preamps without the need of additional transformers and HV filter capacitors.

The VPump can be operated with a standard 12V DC switching power supply.
The switching power supply is not included in the kit.

Specification:
Input Voltage: 12 V DC @ min 4 VA
Output Voltage: 90 - 220 V DC, adjustable
Output Current: 15 mA @ 220 V DC max

Files:

Manufacturer

Herstellerinformationen | Manufacturer Information

Tube-Town GmbH
Rumbergring 37
D-66969 Lemberg
eMail: info@tube-town.de

Customer reviews (3)

Essential information about customer reviews We do not verify that the published reviews come from such consumers who have actually used or purchased the rated goods or services. All reviews, i.e. positive and negative, are published. No reviews that are unobjective, offensive or unrelated to the product will be published.

Asle L., 08/31/2024

Works like a charm and not that hard to assemble. I got two kits for two tube preamp builds. Output voltage range is more like 90 to 290 V. Higher voltage is never a bad thing in tube circuits, though.
There's an easy mod to increase output voltage even further: Change R4 from 470 to 390 ohms. Gives up to 355 V on light loads. voltage is never a bad thing in tube circuits, though.
There's an easy mod to increase output voltage even further: Change R4 from 470 to 390 ohms. Gives up to 355 V on light loads.
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Recommended products:

In-Plug Power Supply 12V / 2 A

Output voltage: 12 V/DC
Output curent: 2000 mA
Input voltage: 230 V/50 Hz

12,20 €

Needed for:

Kit Dumbleator

This is a kit of the famous Dumbleator, can be used as standalone device or for installation in an existing amplifier.

When build as a stand-alone device, the kit can be powered with the TT-VPump, in an amplifier the kit must be supplied via the existing power supply of the amp.

The Dumbleator offers numerous configuration options which are shown in the appended schematics.

Input Levels:
InA: 10-15 Vpp
InB: guitar level - 5 Vpp

The kit includes all the parts needed to build the "standard version" incl. a 12AX7, potentiometers and leads.
It does not include components that are required for the building the extended versions, as well as a power supply or casing.

The Dumbleator utilize POTENTIALLY FATAL HIGH VOLTAGES.
Seek help from a competent technician if you are in any way unfamiliar with high voltage circuits.
Use at your own risk.

Files:

Schematics

34,60 €

Kit LNDVerb

The LNDVerb kit is based on a classic Fender reverb circuit, but uses LND 150 Mosfets instead of tubes. These can be operated at voltages as high as 500 V, to get as close as possible to the characteristics of real tubes.

The kit can be integrated into an existing amplifier or can be build as standalone unit like the Fender tube reverb.

The unit needs less than 10 mA current, so a VPump for example can be used as power supply in a standalone build. If it gets integrated into an existing amplifier the already present power supply of the amp can be used to supply the needed voltage for the unit without the need to upgrade the power transformer.

A reverb transformer of the type 125A20B or similar and a reverb tank are necessary to operate the LNDVerb. These are both not included in the kit.

The needed RCA phone sockets and potentiometers are included in the kit.

Further informations and examples of the finished unit can be found in the PDF below.

Matching parts are linked below and can be ordered with the unit if needed.

Files:

Datasheet

16,20 €

Customers who bought this product bought also the following products:

Mallory 150's 0,68 µF / 100 V DC

Mallory Type 150 is a general purpose capacitor for use in blocking, bypass, decoupling, smoothing and some timing applications.

Epoxy end fill meets UL94V-0
Non inductively wound
Flame retardant outer wrap meets UL510
Non polar

Specifications:

Operating Tempeature Range: –55 ºC to +125 ºC (derate linearly to 50% rated voltage at 125 ºC)
Dielectric Withstand Voltage: .6 x rated voltage for 2 s @ +25 ºC ±5 ºC
Dissipation Factor (DF): tgd x 10–4 at +25 ºC ±5 ºC
Insulation Resistance: 10,000 MO x µF, 30,000 MO Min.
Self Inductance: 1 nH max. per 1 mm lead and body length
Life Test: 1000 hrs @ 85 ºC 1.25 x Vn
Damp Heat Test: 95% RH @ +45 ºC for 21 days
Soldering: 260 ºC ±5 ºC for 10 s ±1 s
Long Term Storage Stability: ?C/C = ±3% after 2 years

3,20 €

EH 7025 (12AX7 / ECC83 HQ)

Electro-Harmonix has released a low noise, low microphonic version of the 12AX7 that meets all specifications required for the tube to be designated 7025. The original 7025 tube was a 12AX7 that was tested and selected for the lowest noise and microphonics for use in the critical first preamp stages of amplifiers where noise and microphonics could be an issue. In order to ensure that the 7025 specification is consistently met, Electro-Harmonix has redesigned the structure of the 12AX7 and has implemented construction techniques to ensure the absolute lowest noise and microphonics possible. In all samples tested, noise and microphonics could not be detected.

The Electro-Harmonix 7025EH has a mid-range that gives clarity and definition to the sound and a smooth top end for warmth and balance. With these characteristics, along with the exceptionally low noise and low microphonics, the Electro-Harmonix 7025EH will work equally well in vintage and modern high-gain guitar amplifiers, as well as sensitive phono preamps.

19,80 €