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Messages - flester

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1
Tubes and Hybrids / Re: 12 v tube preamp
« on: January 26, 2020, 02:23:23 AM »
Shipping cost will double the price but might still be worthwhile if I buy other stuff from them. They do have tube amp kits from €150 or so. Still nervous about the high voltage stuff but I feel like I will have to scratch the tube itch some time.

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2
Tubes and Hybrids / Re: 12 v tube preamp
« on: January 20, 2020, 11:47:03 AM »
would something like this help?
https://tube-town.net/info/datenblaetter/kits/vpump_layout_v1_4.pdf

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3
Tubes and Hybrids / Re: 12 v tube preamp
« on: January 20, 2020, 03:17:07 AM »
Thanks for that. My phone is having trouble opening links. Will have a loo later

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4
Tubes and Hybrids / Re: 12 v tube preamp
« on: January 19, 2020, 01:27:52 PM »
Yes I have seen the Paia version in Craig Andertons project book. Might be an option if the kits are still available. Building it from the  schematic is probably beyond my skill level.

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5
Tubes and Hybrids / Re: 12 v tube preamp
« on: January 18, 2020, 04:00:56 AM »
Sorry I meant Orange Micro Terror which has a solid state power amp. Just curious about how they run the 12AX7 preamp using a 15 v power supply.

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6
Tubes and Hybrids / Re: 12 v tube preamp
« on: January 17, 2020, 04:32:08 AM »
I ordered some 12*U7 and sockets and am going to give this a try.
I see that there are some hybrid amps e.g. the Orange Tiny Terror which has a 12 AX7 preamp and uses a 15v power supply. Is that likely to be a starved plate or is the voltage stepped up internally? Is this a realistic option for DIY?

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7
I had been wondering about those. It is sort of suggested that they have all the goodness of tubes without the drawbacks. I wonder...

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8
Tubes and Hybrids / 12 v tube preamp
« on: December 17, 2019, 12:25:40 PM »
I've seen a few references to building tube preamps e.g. https://www.instructables.com/id/The-ValveLiTzer-Low-voltage-Tube-Booster/
https://www.instructables.com/id/The-Valve-Caster-20-Tube-Boost-and-Overdrive/
Any comments on whether this is worth doing e.g. will it really sound any different to  solid state version?

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9
Preamps and Effects / Re: So you need a preamp - here are your options
« on: November 29, 2019, 05:44:46 AM »
OK I built up a buffer with MPF102. Definitely brightens the sound compared to going directly into my Kemo 40w power amp but less so in front of the TDA2003 or the LM386. This is using a 6" speaker, and fairly short guitar cables. Now to try it via my 1x12 and longer cables.

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10
Preamps and Effects / Re: So you need a preamp - here are your options
« on: November 07, 2019, 05:03:55 PM »
Thanks for that. Think I'll just get some MPF102 and J201's as recommended.

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11
Preamps and Effects / Re: So you need a preamp - here are your options
« on: November 06, 2019, 06:44:31 PM »
these are the ones I've tried without success but maybe I need to mess around a bit more

http://www.farnell.com/datasheets/2304095.pdf?_ga=2.184256102.1389724509.1573081103-1254332340.1566743493

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12
Preamps and Effects / Re: So you need a preamp - here are your options
« on: November 06, 2019, 06:25:32 PM »
Thanks for that. I think this one may fall into the correct range.
http://www.farnell.com/datasheets/1796807.pdf?_ga=2.8128754.1389724509.1573081103-1254332340.1566743493

I note that the datasheet says , it used for '... low level switching...chopper-stablilised amplifiers...' etc. DOes that have a bearing on my intended use?

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13
Preamps and Effects / Re: So you need a preamp - here are your options
« on: November 04, 2019, 05:36:00 AM »
Could I get some guidance on how to select 'equivalent' transistors, for example where a J201 or MPF102 is specified but not available. Apart from just googling 'J201 equivalent', is there way to select based on specs in the data sheet? At present I am planning a preamp to go in front of my TDA2003 amp.

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14
Small bass amps are sometimes recommended for cleans. Also check out some Steel Guitar forums.
They often favour clean SS tones with Peavey and the Roland Cube range often coming up (though the latter use modelling a lot).

15
Preamps and Effects / Re: Rechargeable 9v batteries for fx pedals
« on: July 07, 2019, 04:11:22 AM »
The ones I have are a few years old and Ni-Cad. I was using them to power a TDA2003 amp drawing up to 500mA. My hungriest battery driven pedal draws 30mA and the rest are single figures.

Maybe I just need a newer set of batteries. Worst case I leave a pedal powered on overnight and need a new battery.

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