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PostPosted: Thu Jul 03, 2008 10:42 am 
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Keep in mind that germanium transistors are devices that were intended to be used at room temperature. If you don't have air conditioning and you don't live in Alaska, chances are that your fuzz pedal will sound like poop.

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PostPosted: Tue Jul 28, 2009 10:36 pm 
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will the heat also effect the output? ie lower output b/c of high temp?

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PostPosted: Wed Jul 29, 2009 2:57 am 
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Location: West Wales ... isn't it.
"SUMMER TIME HEAT" ... ????

Nope, you lost me.


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PostPosted: Wed Jul 29, 2009 3:31 am 
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Naz Nomad wrote:
"SUMMER TIME HEAT" ... ????

Nope, you lost me.


He doesn't mean us Naz, we're ok. Though you might like to run a small electric heater next to your Germs to get them up to room temperature during the British summer.

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PostPosted: Wed Jul 29, 2009 10:16 am 
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It has been over 100 degrees F ( 37.77777 °C for those of you not living in the Good Ol USA!) for a week.

Been riding my bike. I am starting to make poopy noises, too.

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PostPosted: Thu Jul 30, 2009 8:12 am 
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madbean wrote:
A true rock and roller has a dude that fans fuzz pedals for him while he jams.


Or even classier, an ice sculpted pedal board.


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PostPosted: Thu Jul 30, 2009 8:16 am 
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Location: West Wales ... isn't it.
crbmoa wrote:
It has been over 100 degrees F ( 37.77777 °C for those of you not living in the Good Ol USA!) for a week.


You get degrees, we get 'inches of rain' ... :evil: :D


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PostPosted: Thu Jul 30, 2009 8:18 am 
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Hey Naz, I notice you're in West Wales - whereabouts? I spent a summer working in Little Haven some years ago, I know that area pretty well.

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PostPosted: Thu Jul 30, 2009 8:56 am 
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Location: West Wales ... isn't it.
I'm inland from Aberystwyth about 12 miles, quite a bit further up the coast from Haverfordwest.


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PostPosted: Thu Jul 30, 2009 9:27 am 
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Naz Nomad wrote:
crbmoa wrote:
It has been over 100 degrees F ( 37.77777 °C for those of you not living in the Good Ol USA!) for a week.


You get degrees, we get 'inches of rain' ... :evil: :D


I live in the desert now, but I grew up in the Willamette Valley.

Average annual rainfall from 1970 to 1994 was 51.5 inches. We had two seasons. Warm rain / cold rain.


51.5 in = 130.81 cm, according to the interwebz :wink:

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PostPosted: Tue Aug 04, 2009 5:39 pm 
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Naz Nomad wrote:
Aberystwyth.

That's easy for you to say...

Sorry, that was so cheap. (I like cheap).


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PostPosted: Fri Sep 18, 2009 3:26 am 
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put your fuzz in the fridge like SRV did :D


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PostPosted: Fri Sep 18, 2009 3:44 am 
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germanium transistors were made for people in the UK, USA people have to use poo silicon ones :)

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PostPosted: Tue Oct 13, 2009 2:08 pm 
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here's a mod to make it less temperamental: add a germanium diode between base and emitter, esp on q1.


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PostPosted: Wed May 27, 2015 7:59 pm 
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can you show us a photo or a diagram of how to do that germanium diode mod? it is pretty hot here and my fuzz is having problems. also how long does the refridgerator trick usually last for?


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PostPosted: Thu May 28, 2015 8:46 am 
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vulture moon wrote:
can you show us a photo or a diagram of how to do that germanium diode mod? it is pretty hot here and my fuzz is having problems. also how long does the refridgerator trick usually last for?

Here's a pretty good description of the Ge diode stabilization mod and why it works that I found at THIS LINK:

"There's one trick designers used to do at the golden era of Ge transistors to compensate for the variation of IC0. It consisted of placing a Ge diode (reverse biased) in parallel with the base-emitter junction of the transistor:

Attachment:
ge_tran_stabilization.gif
ge_tran_stabilization.gif [ 882 Bytes | Viewed 33251 times ]


Since the diode is reverse biased, the current through it will be its leakage current I0. Current through the base will then be IB=I-I0. Collector current will be IC=HFE*I-HFE*I0+(HFE+1)*IC0. If HFE is much greater than one and I0 varies with the temperature the same way as IC0 does, then one variation will cancel the other, leaving IC constant.
This stabilization is most necessary at the input transistor of the FF. At the output transistor, there's the 1k pot at the emitter that will help to stabilize variations in all three parameters. You should not note any difference in sound, unless you have a very leaky transistor or diode."

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PostPosted: Fri May 29, 2015 10:17 am 
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byoc wrote:
chances are that your fuzz pedal will sound like poop.


"There ain't no cure for the summertime poos." :D

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PostPosted: Fri May 29, 2015 9:36 pm 
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frequencycentral wrote:

FF_Pedals wrote:

Naz Nomad wrote:

insonicbloom wrote:

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PostPosted: Fri Jul 15, 2016 9:53 am 
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duhvoodooman wrote:
vulture moon wrote:
can you show us a photo or a diagram of how to do that germanium diode mod? it is pretty hot here and my fuzz is having problems. also how long does the refridgerator trick usually last for?

Here's a pretty good description of the Ge diode stabilization mod and why it works that I found at THIS LINK:

"There's one trick designers used to do at the golden era of Ge transistors to compensate for the variation of IC0. It consisted of placing a Ge diode (reverse biased) in parallel with the base-emitter junction of the transistor:

Attachment:
ge_tran_stabilization.gif


Since the diode is reverse biased, the current through it will be its leakage current I0. Current through the base will then be IB=I-I0. Collector current will be IC=HFE*I-HFE*I0+(HFE+1)*IC0. If HFE is much greater than one and I0 varies with the temperature the same way as IC0 does, then one variation will cancel the other, leaving IC constant.
This stabilization is most necessary at the input transistor of the FF. At the output transistor, there's the 1k pot at the emitter that will help to stabilize variations in all three parameters. You should not note any difference in sound, unless you have a very leaky transistor or diode."


yes, thanks for adding schematic and explanation


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