Bottlehead Forum
Bottlehead Kits => Legacy Kit Products => Foreplay III => Topic started by: Nutube on January 28, 2013, 02:07:48 PM
-
I currently have 3.3 auricaps
Would 4.0 auricap bypass with 0.22 russian teflon make a difference
I have them handy and while the fp3 has its belly up I thought to ask before going ahead
what would be a simple way to reduce the first step volume by 6 db or 3 db.? AVC
thanks.
-
The change in value of the Aurucaps will not make any difference. The frequency at which that would have an effect isn't music, that is there are no notes that low.
The KK Teflon bypass should make a difference. Try them with jumpers first so you can listen on, off, on, off and see.
I don't have a calculator handy but I'm sure PJ or PB will chime in with a change for your volume control.
-
The series resistors exist so that the volume can be changed, differently on each input if desired. It's in the manual ... :^)
-
Hey PJ,
He's using Slagle's autoformers. Would you recommend just putting a voltage divider in front of it? Maybe 25k minimum loading the transformer?
-PB
-
I think Tony should probably ask Dave Slagle for tech support on changing the attenuation range of the autoformers. It's not really something we use in our designs and Dave probably has a broader range of experience regarding this.
-
hey doc
I did, he just said that the avc taper cannot be adjusted, i will now ask him what PB mentioned above if it might work. Something voltage divider ahead of the input to the autoformer.
ooops just came back to this post,
p.s I just did an experiment I use a Silk tvc 23 steps as a volume control for the Paramount 300b to help balance the amps between 45 and 300b mid range and mid base.......I used a pair of Y splitter from tvc to paramont and now also to 45 as well. It works for late night whisper listening.! not ideal as I lost the 45 /300b balancing
For louder I just unhook 45 to go back direct to Fp3. as before....not perfect as with both hook up to save tvc I cant balance between the 45 and 300b. May have to get another tvc for tha 45.....So Temporarily solved
hey PJ
I ordered the manual..... but I think I need the extended manual as well
hey grainger
I will add the 0. 22 teflon to hear the diff. I will have to wait tell it breaks in and report back.
With the 3.3 in I got some serious bass with some low organ augmented with a bridged 560 watt amp. So I believe re the teflon is all I need to further the smoothness of the 6sn7
Thanks all
Tony
-
You have me chuckling. This is a fundamental issue of modding our gear. People want to buy some other manufacturer's "improvement" and then we get to troubleshoot the installation of said improvement for the other manufacturer.
-
Try this so you know earlier:
Fast Break In Post (http://www.bottlehead.com/smf/index.php/topic,80.msg286.html#msg286)
-
doc
My over eagerness in recent multiple component changes throughout system caused me NOT to think clearly.
Your point well taken, I apologise. Will try to stay within the confines of your product offerings.
Sorry that I had to make you "chuckle" :-)
-
It's cool Tony. Not meaning to pick on ya', I suppose I should be flattered that everyone comes to us for the answers, even if we didn't didn't make up the questions.
-
doc
As we used to say back in SF in the '60s........"PEACE & FAROUT"
That fp3 is really cooking sounding very good...you guys did a good job on that piece. Rather than repeat all the accolates..it really helped in my system to bring out the spatial quality and details smoothly, seems more power.
I am lurking waiting on reports ( From first adopters) ... to push me over to the beepree...how can that be better I say....
Whomever wired up this CES show fp3 gets a 5 star, ( pb? ) he/she sure did a dandy job...
I am using the 6sn7 with hong kong adapters and have flexibilty of plugging in a 12bh7.... never heard that tube before.....fun and games aplenty.
I have to do your reducing noise floor recomendation, not that it is noisy, but my 105 speakers need a little in
suarance, then add the teflon bypass then let it cook.......while looking out for reviews on beepree.......
Tony
-
I sent Tony to VoltSecond's S5 Attenuator page.
It is heavy reading for me too. He is a real kick, in person. We got together several times at VSAC 2008. One lunch he was talking about noise suppression and drawing schematics on paper napkins. I should have made them into a notebook.
You have an email, best remove it from the above post now.
-
Here is a picture of the inside of my Extended Foreplay III. I changed the sweeter whispers with a logarithmic stepped attenuator and added an AC filter and the caps to lower the noise floor. It also uses the 6CG7 tubes.
I just put it back in the system after an extended period. I have an all digital setup and the DAC has a tube buffer and analog volume control, so did not see the need for it. It still sands so good, but need to decide if it is needed.
(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fi1278.photobucket.com%2Falbums%2Fy504%2FBNAL%2Fforeplay__inside_zps02dcb686.jpg&hash=ad1174166178c9b09850191f9e9051643fe60389)
-
thanks for sharing...that is great workmanship! and design!
I always enjoy seeing the variety of approaches derived from the original...this is fun
Can you share the sound describtion of your new attenu
ation .....