Attenuator issues

Geophysicist · 11th May 2006, 08:39 PM

OK, time to get out the calculator...2500/900 = 2.78....17000/6000 = 2.83. A very similar discount ratio, I have to say. If I could just find a 2T for that same ratio......

Personally, I think the knobs are just right. Not hard to turn and they transmit a really nice tactile feel. I may have to open up the control unit in the future and clean the left side volume control. It has a trace of light crackling noise from about 12 o'clock to 2 o'clock. This disappears if I rotate the knob through those position a few times, then has reappeared the next day thus far. It's not even loud enough to be annoying, but is an early symptom perhaps. What do you think about Caig Pro Gold for cleaning?

By the way, the name's Mike.

john curl · 11th May 2006, 09:35 PM

I would just use industrial grade isopropyl alcohol. I like Caig, BUT not on vital contacts. Bob used to use a fresh pencil eraser for cleaning the contacts as well. Mine have been OK for many years, but we have had some complaints over the years. These contacts should be 'self cleaning' to a great degree.

Bobken · 11th May 2006, 09:42 PM

Hi Mike,

In my experience, Caig products are excellent, and I use them all.

However, they do make a product especially for dealing with pot problems, and it is called CaiLube MCL, which is formulated to work better with conductive-plastic, and carbon pots.

Whilst I reckon the other product, Pro Gold, would be satisfactory, it is made for metal connectors, instead.

As you are in the 'States, Michael Percy appears to stock all the usual Caig range, so you could try him if necessary.

A big mistake made by many is to use too much of these Caig cleaners, which the makers advise against. A small quantity goes a long way!

Regards,

john curl · 11th May 2006, 09:46 PM

Trust me Mike, isopropyl alcohol or Freon only!

john curl · 11th May 2006, 09:48 PM

Use Caig when corrosion or heavy nickel plating is present.

Bobken · 11th May 2006, 09:49 PM

Hi John,

Have you had some bad experience with Caig products?

Regards,

john curl · 11th May 2006, 10:05 PM

Me? Comment on something that I have never tried? Please! I have used Caig products for about 25 years. I have all kinds of Caig products around here. I have them diluted with alcohol for general cleaning. I have pens, bottles, spray cans, and oil spout dispensers. Still, Enid Lumley warned me more than 20 years ago that these products leave a film, and this can potentially interfere with the audio quality, just like Tweek. Apparently, just air between contact 'spaces' is better than an a chemical coating.

Peter Daniel · 11th May 2006, 10:24 PM

I used couple times Caig ProGold "conditioning treatment" on RCAs and binding posts and each time I noticed veiling and loss of resolution. I cleaned it out and never used again.

rdf · 11th May 2006, 11:20 PM

Plus those conditioners attract airborne pollutants. I've had good results from methyl hydrate.

anatech · 11th May 2006, 11:37 PM

I use Electrowash PX to get rid of the gunge.

Nothing like seeing a switch or control full of "Blue Shower"!

-Chris

11th May 2006, 08:39 PM	#1
Geophysicist diyAudio Member Join Date: May 2006 Location: Magnolia, Texas	Mmmm....bigger knobs OK, time to get out the calculator...2500/900 = 2.78....17000/6000 = 2.83. A very similar discount ratio, I have to say. If I could just find a 2T for that same ratio...... Personally, I think the knobs are just right. Not hard to turn and they transmit a really nice tactile feel. I may have to open up the control unit in the future and clean the left side volume control. It has a trace of light crackling noise from about 12 o'clock to 2 o'clock. This disappears if I rotate the knob through those position a few times, then has reappeared the next day thus far. It's not even loud enough to be annoying, but is an early symptom perhaps. What do you think about Caig Pro Gold for cleaning? By the way, the name's Mike.

11th May 2006, 09:42 PM	#3
Bobken diyAudio Member Join Date: Dec 2002 Location: UK	Hi Mike, In my experience, Caig products are excellent, and I use them all. However, they do make a product especially for dealing with pot problems, and it is called CaiLube MCL, which is formulated to work better with conductive-plastic, and carbon pots. Whilst I reckon the other product, Pro Gold, would be satisfactory, it is made for metal connectors, instead. As you are in the 'States, Michael Percy appears to stock all the usual Caig range, so you could try him if necessary. A big mistake made by many is to use too much of these Caig cleaners, which the makers advise against. A small quantity goes a long way! Regards, __________________ Bob

11th May 2006, 09:49 PM	#6
Bobken diyAudio Member Join Date: Dec 2002 Location: UK	Hi John, Have you had some bad experience with Caig products? Regards, __________________ Bob

11th May 2006, 10:24 PM	#8
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	I used couple times Caig ProGold "conditioning treatment" on RCAs and binding posts and each time I noticed veiling and loss of resolution. I cleaned it out and never used again. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

11th May 2006, 11:20 PM	#9
rdf diyAudio Member Join Date: Jun 2004 Location: big smoke	Plus those conditioners attract airborne pollutants. I've had good results from methyl hydrate. __________________ Ears aren't microphones.


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11th May 2006, 09:35 PM	#2
john curl diyAudio Member Join Date: Jul 2003 Location: berkeley ca	I would just use industrial grade isopropyl alcohol. I like Caig, BUT not on vital contacts. Bob used to use a fresh pencil eraser for cleaning the contacts as well. Mine have been OK for many years, but we have had some complaints over the years. These contacts should be 'self cleaning' to a great degree.

11th May 2006, 09:46 PM	#4
john curl diyAudio Member Join Date: Jul 2003 Location: berkeley ca	Trust me Mike, isopropyl alcohol or Freon only!

11th May 2006, 09:48 PM	#5
john curl diyAudio Member Join Date: Jul 2003 Location: berkeley ca	Use Caig when corrosion or heavy nickel plating is present.

11th May 2006, 10:05 PM	#7
john curl diyAudio Member Join Date: Jul 2003 Location: berkeley ca	Me? Comment on something that I have never tried? Please! I have used Caig products for about 25 years. I have all kinds of Caig products around here. I have them diluted with alcohol for general cleaning. I have pens, bottles, spray cans, and oil spout dispensers. Still, Enid Lumley warned me more than 20 years ago that these products leave a film, and this can potentially interfere with the audio quality, just like Tweek. Apparently, just air between contact 'spaces' is better than an a chemical coating.

11th May 2006, 11:37 PM	#10
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	I use Electrowash PX to get rid of the gunge. Nothing like seeing a switch or control full of "Blue Shower"! -Chris

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