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Posted: Mon Sep 20, 2010 1:35 pm
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fhopkins wrote:
63supro wrote:
fhopkins, Now I'm looking at a Tweaker LOL. Low wattage amps are seriously addicting. I'm also looking at the THD Special 6. So far the Rebel's been bulletproof. :D




I hear you brother! Keep us posted!! :wink:
I agree , I have the tweaker on my radar .There are times when a 15 watt master amp with 6v6 tubes could come in very handy.Great sounding amp.


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Post subject: SOUND
Posted: Mon Sep 20, 2010 1:40 pm
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BLUSKY what was the BIAS set on your amp,I have not checked mine...And what did you set it to.
Now what difference did you here on the sound cause i just ordered my tube kit from Eurotubes.

Bu the way how do post a picture on here?


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Post subject: Re: SOUND
Posted: Mon Sep 20, 2010 3:23 pm
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snoprom8 wrote:
BLUSKY what was the BIAS set on your amp,I have not checked mine...And what did you set it to.
Now what difference did you here on the sound cause i just ordered my tube kit from Eurotubes.

Bu the way how do post a picture on here?


Watch this: http://www.eurotubes.com/euro-Fender-HRDV.htm

There are other biasing videos out on the net.

As I have learned, setting the bias is not just cranking the bias pot and reading the Fender test point. I bought this:

http://www.amp-head.com/product_info.ph ... ucts_id=70

With it, I set my bias to 38 mA at a plate voltage of 408 volts. The Fender test point measured 83 mV which by itself is meaningless.

Sound is hard to describe but it sounds "right" to me. :D

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Post subject: Re: New Tubes
Posted: Fri Sep 24, 2010 8:14 pm
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snoprom8 wrote:
Yea that post helped a lot, And I agree with you the notes do not sound clear as they should or I want them to.like I said they sound a little muddy.After talking to Eurotube I think Iam going with the following set up.

Fender Blues Deluxe-Deville Gold Pin Blues Option
Price: $95.50
Description: This kit is the gold pin version of the Blues Option for these amps so if you like it smooth here you go! A hotter matched pair of the JJ 6L6GC's for the reissue or the original fixed bias 90's Blues Deluxe or Deville for a big warm tone along with a standard gold pin ECC83S for V1, a gold pin ECC81 for V2 to drop the gain with one balanced gold pin ECC83S for the phase inverter in V3. These will reduce the preamp gain for players wanting less gain.


I looking for that good Ronnie Earl,Marvin Taylor, blues sound with a good Jazz sound as well, Anyways if anyone has used this let me know.




What do they mean by (((standard gold pin ECC83S for V1)))THE V1 or V2 or V3...I know it has to do with the preamp tube is is V1 the closest to the 2 6L6 tubes?
If you look you have both 6L6 tubes then to the right of them you have another smaller tube by itself then over to the right you have 2 more.


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Post subject: Re: New Tubes
Posted: Fri Sep 24, 2010 9:59 pm
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snoprom8 wrote:
snoprom8 wrote:
Yea that post helped a lot, And I agree with you the notes do not sound clear as they should or I want them to.like I said they sound a little muddy.After talking to Eurotube I think Iam going with the following set up.

Fender Blues Deluxe-Deville Gold Pin Blues Option
Price: $95.50
Description: This kit is the gold pin version of the Blues Option for these amps so if you like it smooth here you go! A hotter matched pair of the JJ 6L6GC's for the reissue or the original fixed bias 90's Blues Deluxe or Deville for a big warm tone along with a standard gold pin ECC83S for V1, a gold pin ECC81 for V2 to drop the gain with one balanced gold pin ECC83S for the phase inverter in V3. These will reduce the preamp gain for players wanting less gain.


I looking for that good Ronnie Earl,Marvin Taylor, blues sound with a good Jazz sound as well, Anyways if anyone has used this let me know.




What do they mean by (((standard gold pin ECC83S for V1)))THE V1 or V2 or V3...I know it has to do with the preamp tube is is V1 the closest to the 2 6L6 tubes?
If you look you have both 6L6 tubes then to the right of them you have another smaller tube by itself then over to the right you have 2 more.


First of all, save yourself some money and buy the regular Blues option without gold pins. Gold pins don't really make that much of a difference in a guitar amp. Hi-Fi stereo amp, maybe but not a guitar amp.

Looking at the back of the amp, from left to right the tubes are:

V5 (Power tube), V4 (power tube), V3 (phase inverter), V2 (preamp), V1 (preamp)

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Post subject: Thanks
Posted: Sat Sep 25, 2010 4:45 pm
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Yea I went down to the local music store and bought 2 JJ6L6 and put them on,
Iam wating for the other 3 to come in...Then I will install them and mess with the bias some,But that answered my question about the V1 , V2, V3, ECT.
And yes I did not go with the GOLD PINSafter all the help I have had off this topic it did not make any difference on it other than saving some cash.


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Post subject: Re: Thanks
Posted: Sat Sep 25, 2010 7:18 pm
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snoprom8 wrote:
Then I will install them and mess with the bias some


Don't "mess" with the bias. You can do serious damage to your amp or yourself. Get the proper tools and set the bias the proper way. I learned my lesson the hard way, as others in this forum can attest.

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Post subject: bias
Posted: Sat Sep 25, 2010 7:34 pm
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I have a freind that has a volt meter I was going to use and follow the direction on EuroTube.But i sure dont want to mess the amp up and I sure as heck dont want to mess myself up..I have heard storys about guys getting shocked after the amp was off and even unplugged....What is it that holds electricity in the tube amps?


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Post subject: Re: bias
Posted: Sat Sep 25, 2010 10:50 pm
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snoprom8 wrote:
I have a freind that has a volt meter I was going to use and follow the direction on EuroTube.But i sure dont want to mess the amp up and I sure as heck dont want to mess myself up..I have heard storys about guys getting shocked after the amp was off and even unplugged....What is it that holds electricity in the tube amps?


Capacitors. Big, honking 500 volt capacitors.

The problem with the Eurotubes bias video, and many others on the Internet, is that even though they show cathode current and plate voltage being measured, they don't stress the relationship between the voltage measured at the Fender test point, and the cathode current and plate voltage. Too many people just focus on the bias voltage measured at the Fender test point without knowing the other numbers. I was one of those people. Folk in this and other forums set me straight. Hence, my recommendation for a bias probe in my earlier post. Bias probes come in many shapes and prices. The one I bought is inexpensive, easy to use, and appears quite accurate. In any case, give it a lot of thought and do some research on the Internet before you plunge off the cliff of working on your own amp.

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Post subject: Re: bias
Posted: Sat Sep 25, 2010 11:57 pm
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bluesky636 wrote:
Too many people just focus on the bias voltage measured at the Fender test point without knowing the other numbers.


+1

You'll be calculating a percentage of max plate voltage dissipation to set the idle bias current. Thus, some basic math skills will be required -- keep a calculator on your bench as well.

And as Bill mentioned, use caution when working on or around an exposed amp chassis.

HTH

Arjay

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Post subject: Re: bias
Posted: Sun Sep 26, 2010 3:56 am
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Retroverbial wrote:
bluesky636 wrote:
Too many people just focus on the bias voltage measured at the Fender test point without knowing the other numbers.


+1

You'll be calculating a percentage of max plate voltage dissipation to set the idle bias current. Thus, some basic math skills will be required -- keep a calculator on your bench as well.

And as Bill mentioned, use caution when working on or around an exposed amp chassis.

HTH

Arjay


I use this in conjunction with the bias probe to determine the "safe" operating zone for the output tubes:

http://www.webervst.com/tubes1/calcbias.htm

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