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Author Topic: Increasing 'Bloom'???  (Read 8416 times)
phil esposito
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« on: March 09, 2010, 06:34:25 PM »
OK...here's a tough question:  How do I get more 'bloom' from my amp?

I'm finding it a little stiff and would be curious as to what contributes to the overall bloomyness?

Thanks!
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bluesfendermanblues
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« Reply #1 on: March 09, 2010, 08:25:39 PM »
Play with a lighter touch and pick attack
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roadapple
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« Reply #2 on: March 09, 2010, 09:42:51 PM »
The amp should be thoroughly broken in (30+ hours of actual playing time) with a broken in speaker as well.  and like the other gent said... light touch... pick attack....
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erwin_ve
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« Reply #3 on: March 09, 2010, 10:31:00 PM »
Quote from: phil esposito on March 09, 2010, 06:34:25 PM
OK...here's a tough question:  How do I get more 'bloom' from my amp?

I'm finding it a little stiff and would be curious as to what contributes to the overall bloomyness?

Thanks!
Sorry guys I don't get the lighter touch/pick thing etc.
What did help for me was; messing with the trimpot for the phase inverter and get the right pre amp tubes.
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bluesfendermanblues
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« Reply #4 on: March 10, 2010, 05:40:19 AM »
Quote from: erwin_ve on March 09, 2010, 10:31:00 PM
Quote from: phil esposito on March 09, 2010, 06:34:25 PM
OK...here's a tough question:  How do I get more 'bloom' from my amp?

I'm finding it a little stiff and would be curious as to what contributes to the overall bloomyness?

Thanks!
Sorry guys I don't get the lighter touch/pick thing etc.
Maybe, because you got a light touch already, judging by you sound clips  Cool
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erwin_ve
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« Reply #5 on: March 10, 2010, 10:48:55 AM »
Besides playing there are possibilities in the amp to make it bloom.
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phil esposito
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« Reply #6 on: March 10, 2010, 01:20:35 PM »
Quote from: erwin_ve on March 10, 2010, 10:48:55 AM
Besides playing there are possibilities in the amp to make it bloom.

This is kinda where I'm thinking.  I've tried the playing/pick attach thing.  I'm a little nervous to go playing with the phase invertor pot...does anybody have guidance on the proper settings?  I thought you need an ocilliscope for this?  That's just scary.... Shocked
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dt125
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« Reply #7 on: March 10, 2010, 06:02:14 PM »
You dont need an oscilloscope, you can tweak it by ear, you wont hurt the amp, just be careful where you put your fingers Grin

OR if you have a DMM take a reading between pin 1 and ground and pin 6 and ground on your phase inverter valve.

Most people seem to like the tone when theres around 6 to 10 volts more on pin 1 than 6 - I find 10 perfect on my HRM
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shebbycaster
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« Reply #8 on: March 14, 2010, 05:40:10 PM »
What does that look like if you measure at the phase inverter?   I've used the trimmer to match the sides of the PI.  Never checked at the tube. 
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dt125
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« Reply #9 on: March 15, 2010, 11:08:21 PM »
Do you mean you've balanced the trimmer itself, i.e resistance wise?
You really want to measure the DC voltage on pin1 and 6 on the under side of the valve base if you're after a true reading
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phil esposito
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« Reply #10 on: March 17, 2010, 06:10:19 PM »
So I had a look at this.  I measured the resistance on the pot before adjustments so I can get back home if I need to.

When I checked it, there was only 3 volts in the difference (pin 1>GND vs pin 6>GND).  So I started playing with it and I can only get about 5.5 volts in the difference.  Is there something wrong?
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hywelg
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« Reply #11 on: March 17, 2010, 07:11:41 PM »
No, probably not, you might simply have an unbalanced valve, try another one.
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