Search found 115 matches

by neskor
Mon May 20, 2024 6:19 am
Forum: Technical Discussion
Topic: Replace overdrive pedal with real tube?
Replies: 7
Views: 211

Re: Replace overdrive pedal with real tube?

Speedypancake wrote: Sun May 19, 2024 7:45 pm Thanks Neskor. Do you have any audio / video clips of the results of that mod??
Unfortunately not :(
you can try, you will not be disappointed for sure
by neskor
Sat May 18, 2024 6:41 pm
Forum: Technical Discussion
Topic: Replace overdrive pedal with real tube?
Replies: 7
Views: 211

Re: Replace overdrive pedal with real tube?

I moded my Guyatone TD-1 pedal and now sounds great in front of the Marshall Plexi.
Replaced ECC83 with ECC82 and removed cliping diodes and replaced 470pF capacitor with resistor.
Schematic looks something like this.
by neskor
Fri Mar 29, 2024 11:41 pm
Forum: Vox/Hiwatt Discussion
Topic: Hiwatt DR504, looking for a little info
Replies: 5
Views: 2123

Re: Hiwatt DR504, looking for a little info

it looks like transformer made by Heyboer
by neskor
Fri Mar 29, 2024 11:24 pm
Forum: Technical Discussion
Topic: uTracer (Micro Curve Tracer)
Replies: 300
Views: 86287

Re: uTracer (Micro Curve Tracer)

Did you maybe try V6.2 version?
by neskor
Wed Mar 27, 2024 1:34 pm
Forum: Technical Discussion
Topic: Fryette Power Station
Replies: 18
Views: 1659

Re: Fryette Power Station

You have something lake that: Boss Waza TAE
by neskor
Sun Mar 24, 2024 4:42 pm
Forum: Technical Discussion
Topic: Fryette Power Station
Replies: 18
Views: 1659

Re: Fryette Power Station

more pictures
by neskor
Sat Mar 23, 2024 5:11 pm
Forum: Technical Discussion
Topic: Fryette Power Station
Replies: 18
Views: 1659

Re: Fryette Power Station

no schematic available, as I know
check the picture for internals
by neskor
Sat Feb 03, 2024 5:39 pm
Forum: Marshall Discussion
Topic: Marshall Hot Rod diode clipping connection method difference?
Replies: 8
Views: 1063

Re: Marshall Hot Rod diode clipping connection method difference?

check here
by neskor
Thu Dec 14, 2023 8:14 pm
Forum: Dumble Discussion
Topic: Dumble video/sound clip reference, real Dumbles only please
Replies: 383
Views: 354082

Re: Dumble video/sound clip reference, real Dumbles only please

by neskor
Sun Oct 15, 2023 5:27 am
Forum: Marshall Discussion
Topic: Primary impedance of original jtm 45 ot?
Replies: 18
Views: 8141

Re: Primary impedance of original jtm 45 ot?

If put all the results in this online calculator step-down ratio looks OK
https://www.hagtech.com/loading.html
by neskor
Sun Oct 15, 2023 5:26 am
Forum: Marshall Discussion
Topic: Primary impedance of original jtm 45 ot?
Replies: 18
Views: 8141

Re: Primary impedance of original jtm 45 ot?

If I apply 400hz AC signal 1V RMS on secondary, on primary I'm getting 26.65V RMS, so it should be OK with 6.5K/8R relation
by neskor
Sun Oct 15, 2023 5:25 am
Forum: Marshall Discussion
Topic: Primary impedance of original jtm 45 ot?
Replies: 18
Views: 8141

Re: Primary impedance of original jtm 45 ot?

With 1Khz C settings and from Ub+ to secondaries I'm getting 1440pF
by neskor
Sun Oct 15, 2023 5:24 am
Forum: Marshall Discussion
Topic: Primary impedance of original jtm 45 ot?
Replies: 18
Views: 8141

Re: Primary impedance of original jtm 45 ot?

understand that, but is the same like inserting voltage on primary and measure sec. , calculate by hand? did you check and confirm ? :P put 1khz C setting and try from Ub+ to secondaries.. should be around 1-5nF if is good trafo, if doesnt measure try via normal multimeter, on C selector, usually i...
by neskor
Sat Oct 14, 2023 8:55 pm
Forum: Marshall Discussion
Topic: Primary impedance of original jtm 45 ot?
Replies: 18
Views: 8141

Re: Primary impedance of original jtm 45 ot?

hi neskor, can you explain what exactly you are measuring = 6.5k ohms here? when you have this trafo on hand , how much is parasitic capacitance between P and S? any tap is ok 6.5K is primary impedance with 8R on secondary I tried to measure parasitic capacitance between P and S but results vary to...
by neskor
Sat Oct 14, 2023 7:12 pm
Forum: Marshall Discussion
Topic: Primary impedance of original jtm 45 ot?
Replies: 18
Views: 8141

Re: Primary impedance of original jtm 45 ot?

Roe wrote: Sat Oct 14, 2023 7:52 am on the 15 ohms output arrangement, not the 7/8 ohms out?
it is measured on 8 ohm tap with 8R resistor on secondary