Pre and power amp schematic for record player

[hesamadman]

Thinking about building a tube receiver for my record player. Is there any available schematics for this?

[kagliostro]

The title didn't seem to be in accord with your request for a Tube Receiver Schematic

if you are looking for a radio receiver schematic there are thousands of schematics availables

but my council is to purcase one, to build a radio receiver is not simple because it implies

the use of special parts like variable air capacitors, capacitor trimmers, medium frequency coils (I hope it is the right english name)

so it will be better for you to purcase an old apparatus, working or to be restored

K

[HotBluePlates]

Thinking about building a tube receiver for my record player. Is there any available schematics for this?

Do a search for "tube RIAA phono preamp" perhaps with the word "kit". You will need to know the type of cartridge your record player is using to select the correct preamp.

The power amp section is the same as any other power amp, because the RIAA preamp boosts the signal to drive a power amp's input stage. You would probably buy/build any standalone tube stereo power amplifier.

You could buy/build an all-in-one amplifier (usually called an "integrated amplifier") but different designs may include other things you don't want/need (radio receiver, tape deck input, etc). An integrated amplifier is probably cheaper to buy, unless you're looking at some rare/collectible model or have most parts already on hand.

[shooter]

FWIW this is the one I built for my LP's,MP3's but my LP player has an Aux out, which you'll need for this amp, straight from the needle the signal is *ok*, but somewhat quiet.  works good as a practice amp also 

[DummyLoad]

for phono and pre:


http://glass-ware.stores.yahoo.net/aiphpcb.html


for amp:


http://store.triodestore.com/trmk3tuampki.html


--pete

[kagliostro]

Oh, sorry, I misunderstand you


may be this are of your interest


http://www.pmillett.com/file_downloads/LR%20Phono%20Preamps.ppt


http://www.pmillett.com/pentode_phono_preamp.htm


K

[Paul1453]

Shooter, that's a great little circuit you provided!   
 I've been searching for something like that.  I haven't seen a dual EL84 output circuit like that yet.  Whenever there are 2 output tubes they always seem to be set up in a push pull configuration.  To me this looks like a redundant push push configuration where if one output tube fails the amp still functions but with significantly less output.  With the 12AV7 and 12AX7 preamp tubes it looks like it can push the output circuit into nice distortion for a guitar amp.  How does this sound as a guitar amp?  Can it go from clean to high gain tube distortion with a guitar input?

[shooter]

I haven't seen a dual EL84 output circuit like that yet

It's PSE (parallel single ended)  I've built 3 or 4 PSE, same SE, 1 QSE (quad), and 1 TSE (triple).

It was built as a clean amp for listening to music, but with enough *commonality* that playing guitar should work.  clean it's "jazzy", dimed you get into nice "tamed"" marshall/Vox.  I have "plexi-ish" 25W PP and the PSE sounds close through a 2X12.

on my quad I could pull 2 tubes, change my speaker impedance and play on, the *listening volume* wasn't a drastic change, more like muted from the 4 tubes.

I'm working up the "next" mono, the schematic should be posted hopefully within a week.  It's also a PSE but I haven't ever don 6V6 so.........

[Paul1453]

So yours circuit says 10W.  I know the EL84 has 5W output se, and like 12-18W output pp right?  The parallel configuration just adds the output W of the tubes?  This circuit would do well with pedals for the guitar then?

[HotBluePlates]

... This circuit would do well with pedals for the guitar then?

Be sure to not use ny of the components between the input jack and 1st tube, except the series 27kΩ and the 1MΩ to ground.

[shooter]

This circuit would do well with pedals

I'm not a player and I have yet to get it gig tested, that said most of my *SE handle pedals well.  And HBP is right, the "front-end" filter is from a Marantz stereo.  The CF could be simplified and the other 1/2 tube could be used for more preamp distortion - think OD, something like that.

[DummyLoad]

a simple read with some decent examples.


http://www.introni.it/pdf/Rodenhuis%20-%20HiFi%20Circuits.pdf


--pete