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tone control on your d104-m

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Old 08-04-2005, 09:48 PM
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Default tone control on your d104-m


have you ever wished you could change the tone on your d104 like you can with the 575, I did and its easy,
the late d104 and the 575 use same amplifier and same cartridge but the 104 uses a fixed load resister and the 575 uses a 100k in series with a 2meg potentiometer, if you want lots of bass then clipping the load resister will do the trick but i dont recommend that even though some have done it and are happy with the sound, a better way is to use a 2meg potentiometer in series with the 270k fixed resister thats in the mic already, unsolder the end of the 270k thats connected to ground and either insert a 2meg/2.5meg pot, middle wiper leg goes to the lifted 270k resister and one of the remaining legs goes to ground this will give you a good range of tone adjustment, or if you want to be stingy you could just use a fixed resister around 500k to 1 meg to get a bass boost without going ott, heres a pic to help you locate the resister
if you just want to remove some trebble for ssb use then a small value cap in series with a 500k resister connected from the wire end of the 270k load to ground will do it, I would start with a .0022uf cap and see how it sounds if its removed too much then go smaller on the cap.
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Old 08-10-2005, 08:21 AM
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I ran a 575-M6 for damned near 15 years in my motor cars / and even tried it on the base a few times ,my experiance with those and the tone control slider on the side of the mic is that it always sounded best in the middle ,it was kind of strange though ? up or down on the slider would almost give what sounded like a off frequancy sound ,very strange ? I have since retired my 575-M6 in my motor car /RK-56 all the way these days/ I still don't know what in the hell I was thinking all those years with that power mic in my ride ? I was never much for road noise or back ground modulation coming in ,tuned up radios I would only have to crack the volume control sliders on those anyway (it was the same with the D-104 hand helds) I suppose depending on how the radio was tuned ? I never really needed a power mic / IM very pleased with the RK-56 being a NC mic along with not being amplified/I suppose it just dependings on how ones radio has been tuned in many cases ? I notice the 575-M6's are going for a very good price these days on Ebay ,saw one go for 100 bucks the other day !! Remarkable !!

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Old 08-10-2005, 02:19 PM
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i hear you on the price, i see them going for 50+ used which is more than they ever cost new, even the d104's are 48 plus shipping and people here pay it which is crazy, i just bought a brand new d104 from ebay usa which cost me 26 and thats including shipping from the seller to my buddy and his shipping costs to me.
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Old 03-30-2008, 12:16 PM
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Thanks bob for the info
I have a D104 that sound's like poop going to try what you posted and see
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Old 03-30-2008, 06:19 PM
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Quote:
Originally Posted by fatdude1 View Post
Thanks bob for the info
I have a D104 that sound's like poop going to try what you posted and see
It works great.

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Old 03-30-2008, 06:28 PM
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i will second that it works great.

i am very happy with mine.
not so tinny sounding anymore.
LC
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Old 04-07-2008, 07:20 PM
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Old 04-07-2008, 08:00 PM
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