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I am very glad to here you solved all of your problems. Good troubleshooting Hulk!
Wireing the Gyraf Pultec
- Thread starter Hulk
- Start date
Help Support GroupDIY Audio Forum:
Hulk
Well-known member
I was wondering if the high current overload (I only had the power on for a very short time but I measured 440VDC!!) cound have destroyed/affected some of the components in the circuit??
I tried out the Pultec shortly yesterday and first it did not seem to work but after a few minutes it started to work (I guess it had to warm up??) but I don't feel like it processes the sound very much in the higher frequencies - there is a difference but it's very subtle on the sound and even when the knobs are turned to extreme settings the changes to the sound are subtle and not obvious - the lower frequencies are boosted/cut very nice.
I'm thinking about matthias' inductor test where the Toko inductors (I'm using Tokos too) made the sound sample almost harsh at extreme setting but I'm not able to do that to my sound samples in the higher frequencies!!
Any thoughts??
I tried out the Pultec shortly yesterday and first it did not seem to work but after a few minutes it started to work (I guess it had to warm up??) but I don't feel like it processes the sound very much in the higher frequencies - there is a difference but it's very subtle on the sound and even when the knobs are turned to extreme settings the changes to the sound are subtle and not obvious - the lower frequencies are boosted/cut very nice.
I'm thinking about matthias' inductor test where the Toko inductors (I'm using Tokos too) made the sound sample almost harsh at extreme setting but I'm not able to do that to my sound samples in the higher frequencies!!
Any thoughts??
If there's sound coming through the unit at approximately the right levels, then it's allright.
The remaining problems are then in the eq section. Verify that your capacitors and inductors are the right ones. Try the eq with diffeerent settings and sweep tones to check what it is doing. Somewhere around here there is some freq plots to compare to.
Jakob E.
The remaining problems are then in the eq section. Verify that your capacitors and inductors are the right ones. Try the eq with diffeerent settings and sweep tones to check what it is doing. Somewhere around here there is some freq plots to compare to.
Jakob E.
Hulk
Well-known member
The Pultec is working perfect - an incredible unit!!
I have a red 3mm light diodes that I would like to use on the frontpanel as an on/off indicator.
Where can I draw 2VDC for the diode - what about the circuit around the LM317???
I have a red 3mm light diodes that I would like to use on the frontpanel as an on/off indicator.
Where can I draw 2VDC for the diode - what about the circuit around the LM317???
Yes, use the heater 12V for the LED - use a 1K or 2K2 1W resistor in series with the 12V to drop voltage.
I would recommend a "real" 12V lamp in a jewel holder - like the ones on guitar-amps - that would look much better..
Jakob E.
I would recommend a "real" 12V lamp in a jewel holder - like the ones on guitar-amps - that would look much better..
Jakob E.
