Search found 64 matches

by merlin el mago
Wed Jun 07, 2023 10:12 am
Forum: Playing With Airgaps
Topic: Magnetized AVC?
Replies: 11
Views: 43566

Re: Magnetized AVC?

Yes thanks, now it's working ok, the problem was the lineamp.

Have a nice day Dave & thanks for support.
by merlin el mago
Thu Jun 01, 2023 2:25 pm
Forum: Playing With Airgaps
Topic: Magnetized AVC?
Replies: 11
Views: 43566

Re: Magnetized AVC?

With a new and better DVM measured again direct pin to pin at AVC:

Position att. Left & right channel
1 0R45 0R45
2 0R70 0R70
3 1R14 1R13
4 1R77 1R75
5 2R75 2R72
6 4R30 4R27
7 6R76 6R70
8 10R62 10R54
9 16R53 16R40
10 25R54 25R35
11 38R90 38R80
12 58R30 58R09
13 70R64 70R33
by merlin el mago
Sat Nov 26, 2022 7:30 pm
Forum: Playing With Airgaps
Topic: Magnetized AVC?
Replies: 11
Views: 43566

Re: Magnetized AVC?

But the noise in both channels is in all positions?
by merlin el mago
Thu Nov 24, 2022 3:33 pm
Forum: Playing With Airgaps
Topic: Magnetized AVC?
Replies: 11
Views: 43566

Re: Magnetized AVC?

Could be dust at the switch?
by merlin el mago
Thu Nov 24, 2022 3:19 pm
Forum: Playing With Airgaps
Topic: Magnetized AVC?
Replies: 11
Views: 43566

Re: Magnetized AVC?

Yes 867 ohms.

DCR between pins 12 & 13 are 0R35 both channel at the autoformer, unfortunately a little bit complicate to measure at the switch.
by merlin el mago
Thu Nov 24, 2022 11:04 am
Forum: Playing With Airgaps
Topic: Magnetized AVC?
Replies: 11
Views: 43566

Re: Magnetized AVC?

Yes both channels. The source driving impedance is 867,2354 ohms. DVM measurements: Position att. Left channel Right channel 1 0R15 0R22 2 0R66 0R61 3 0R83 0R82 4 1R27 1R24 5 1R86 1R85 6 2R83 2R80 7 4R34 4R32 8 6R83 6R71 9 10R64 10R47 10 16R39 16R18 11 38R21 38R10 12 57R47 56R95 13 57R17 56R94 TIA f...
by merlin el mago
Thu Nov 17, 2022 6:04 pm
Forum: Playing With Airgaps
Topic: Magnetized AVC?
Replies: 11
Views: 43566

Magnetized AVC?

All summer without listening music due to the hot temperature, few days ago connected to listen & my god the sound it's distorted like a vacuum tube gone, without bass & with cutoffs. When I have time I will use my signal generator to see what happens with the signal trought the AVC. I'm sur...
by merlin el mago
Thu Nov 17, 2022 5:51 pm
Forum: Attenuators
Topic: $200 avc wiring diagram
Replies: 6
Views: 6401

Re: $200 avc wiring diagram

Sure, buying other unit and connecting the cold as the hot signal.

Good lucky.
by merlin el mago
Sat Mar 12, 2016 2:56 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

Many thanks Dave.
by merlin el mago
Sat Mar 12, 2016 12:34 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

Dave, for headphones can I use this crossfeed before or after the AVC?
by merlin el mago
Tue Mar 08, 2016 4:42 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

Sounds better. What gauge of Cardas magnet wire do you use?

Thks
Felipe
by merlin el mago
Tue Mar 08, 2016 2:40 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

OK I will do and let you know, thanks.
by merlin el mago
Mon Mar 07, 2016 5:18 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

dave slagle wrote:then restack them with all the E-s on one side and all the I's on the other as shown in the link above.

dave
where is the link?

felipe
by merlin el mago
Sat Mar 05, 2016 4:57 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

Dave I prefer 20hY
by merlin el mago
Fri Mar 04, 2016 1:57 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

What's the inductance AVC stacked: 1-2-3-4-3-4-3-4-3-4-3-2-1?
by merlin el mago
Thu Mar 03, 2016 8:59 am
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

How to change a butt gap 20~25hY, changing the stacked lams?
by merlin el mago
Wed Mar 02, 2016 9:18 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

merlin el mago wrote:I'm using single ended output and it's practically zero ohm to 100khz.

Felipe
by merlin el mago
Wed Mar 02, 2016 9:23 am
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

Dave AVC still with a little bit bass but the rest of frecuencies sounds great, theres is a way to increase the inductance to get more bass?
by merlin el mago
Sun Feb 28, 2016 7:25 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

Dave works like a charm, thanks for your patient and kind support.
by merlin el mago
Sun Feb 28, 2016 1:21 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

You are right Dave, wired wrong. Time to listen if now it's the sound OK.
by merlin el mago
Sun Feb 28, 2016 11:37 am
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

The input & output varies the same manner the impedance.
by merlin el mago
Sat Feb 27, 2016 7:43 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

1st position 0.1R
2nd 0.6R
3rd 0.8R
4th 1.3R
by merlin el mago
Sat Feb 27, 2016 4:56 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

Dave fixed the DC offset of BIII + Legato I/V, now I'm sure 100% there isn't DC goint to the AVC but still sounds distorted with DSD & now with PCM music also.

To be sure now I connected 4uF at the AVC inputs, don'0t sound distorted but the sound is too thin without body and bass.
by merlin el mago
Sat Feb 13, 2016 12:31 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

No resistance from the coil to the core.

Yes happen in both channels.

No only PCM & DSD files, vinyl sounds OK.

Felipe
by merlin el mago
Thu Feb 11, 2016 4:18 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

Can be the Chinese switch?
by merlin el mago
Thu Feb 11, 2016 4:11 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

1 pos. 0R3 2 pos. 0R8 3 pos. 1R1 4 pos. 1R5 5 pos. 2R1 6 pos. 3R1 7 pos. 4R7 8 pos. 7R2 9 pos.11R2 10 pos. 16R7 11 pos. 25R4 12 pos. 38R7 13 pos. 57R8 1 pos. 0R3 2 pos. 0R9 3 pos. 1R1 4 pos. 1R5 5 pos. 2R2 6 pos. 3R1 7 pos. 4R7 8 pos. 7R2 9 pos.11R2 10 pos. 16R7 11 pos. 25R7 12 pos. 38R9 13 pos. 58R1
by merlin el mago
Thu Feb 11, 2016 3:26 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

Yes I feed 1Khz sinus as is amplifiying OK.

I will measure and let you know.

Thanks for support
Felipe
by merlin el mago
Wed Feb 10, 2016 5:02 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

Dave?
by merlin el mago
Tue Feb 09, 2016 7:06 pm
Forum: Attenuators
Topic: Autoformer volume control problem
Replies: 73
Views: 54526

Same problem after the Lundhal using the 26 preamp.