Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Lundahl LL1663 PP
Lundahl LL1663 PP
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 8th September 2019, 09:58 AM   #1
K.A.B is offline K.A.B  Sweden
diyAudio Member
 
K.A.B's Avatar
 
Join Date: Nov 2005
Location: Sweden
Default Lundahl LL1663 PP

What to do with LL1663 PP 5K push-pull i have no idea at all.

Anders
  Reply With Quote
Old 8th September 2019, 11:04 AM   #2
schiirrn is offline schiirrn  Germany
diyAudio Member
 
Join Date: Nov 2018
Do you have them sitting around and need a project or do you abou what it was designed for?
__________________
Preferred BSC? Just using a wide enough baffle.
  Reply With Quote
Old 8th September 2019, 12:44 PM   #3
Steve Morley is online now Steve Morley  Canada
diyAudio Member
 
Join Date: Jan 2015
Location: Georgian Bay
An EL34 amp springs to mind. 30 to 35 WPC. Hopefully you have a pair.

Steve
  Reply With Quote
Old 8th September 2019, 08:01 PM   #4
mctavish is offline mctavish  Austria
diyAudio Member
 
Join Date: Feb 2008
Location: Niederösterreich
Youu could free yourself of thee burden of this question if you choose to sell them to me..... I have been looking for a pair of these...
  Reply With Quote
Old 8th September 2019, 09:47 PM   #5
K.A.B is offline K.A.B  Sweden
diyAudio Member
 
K.A.B's Avatar
 
Join Date: Nov 2005
Location: Sweden
Yes i need another project even if i have a few waiting i have EL34 project in next round of building i will try them and i have a pair. No they are not fore sale.

Anders
  Reply With Quote
Old 8th September 2019, 10:25 PM   #6
Steve Morley is online now Steve Morley  Canada
diyAudio Member
 
Join Date: Jan 2015
Location: Georgian Bay
If you can't make an amp that sounds good with the Lundahls it's probably not the fault of the OPTs. I heard a set of Lundies that made a huge difference in an Elekit amp (versus the stock OPTs).

S.
  Reply With Quote
Old 9th September 2019, 03:41 AM   #7
gingertube is offline gingertube  Australia
diyAudio Member
 
Join Date: Oct 2004
Location: Adelaide South Oz
How about:
EL34 Baby Huey Amplifier
There is a group buy for PCBs to suit.
Use EL34, 6CA7 or KT77 or even 6L6.
The 33% UL taps may suit 6L6 better than the more usual 43%.
Cheers,
Ian
  Reply With Quote
Old 9th September 2019, 06:46 AM   #8
6A3sUMMER is offline 6A3sUMMER  United States
diyAudio Member
 
Join Date: Jun 2016
UL taps: 33% will give the tube more effective transconductance (voltage to current gain) versus 43%. One disadvantage is that 33% will give the tube a higher effective plate resistance (versus 43%), so you will require more global negative feedback to get the same damping factor as the 43% tap would get.

But 33% will give more maximum watts out for the same B+ and same control grid bias than 43%.

The 6L6 is the lower transconductance of the tubes in post #7.

You should end up with a good performing and sounding amp, no matter which of those tubes you use.

Last edited by 6A3sUMMER; 9th September 2019 at 06:52 AM.
  Reply With Quote
Old 9th September 2019, 08:29 AM   #9
K.A.B is offline K.A.B  Sweden
diyAudio Member
 
K.A.B's Avatar
 
Join Date: Nov 2005
Location: Sweden
Steve Morley@
I already have an SE amplifier with LL transformer and can agree that it can be very good but then the rest should also be good.

gingertube@

I have already assembled most of the components for an EL 34 amplifier, which is a well-known Swedish construction that several DIY builders collaborated with, but it is time for me to build mine. this amp can use whole range from 6L6 to KT88 maybe even the newer kt-tubes.

6A3sUMMER@

Thanks for remember me.

Last edited by K.A.B; 9th September 2019 at 08:31 AM. Reason: wrong word
  Reply With Quote
Old 9th September 2019, 02:09 PM   #10
Tubelab_com is offline Tubelab_com  United States
diyAudio Member
 
Tubelab_com's Avatar
 
Join Date: Jul 2005
Location: West Virginia panhandle
My LL1663's are in a pentode mode push pull amp with 6GF5 small TV sweep tubes. I chose the tubes and transformers because of their low height since the amp is a 2 RU rack mount case. The sound quality is very good. Power output is about 35 WPC.
__________________
Tubelab, it's 5 year mission. To explore strange new tubes, to seek out new circuits and topologies, to boldly go where no tube has gone before......
  Reply With Quote

Reply


Lundahl LL1663 PPHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS Lundahl LL1663 50mA SE OPT Pair repycte Swap Meet 1 28th May 2017 07:45 PM
FS Lundahl LL1663 P-P debk Swap Meet 2 28th January 2016 08:49 AM
FS: 1 pair Lundahl LL1663/50mA Output-transformers M_Balou Swap Meet 2 14th March 2013 10:22 PM
LL1663 -> 4,6K instead of 5K? stigla Tubes / Valves 1 8th December 2002 09:39 PM


New To Site? Need Help?

All times are GMT. The time now is 09:14 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki