Which is the poor man 45 tube? - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

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

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 19th September 2006, 01:38 AM   #1
Jaime is offline Jaime  Uruguay
diyAudio Member
 
Jaime's Avatar
 
Join Date: Apr 2004
Location: Montevideo
Default Which is the poor man 45 tube?

Which is the poor man 45 tube in SET?
The 1626, may be?
__________________
I write in English worse than Tarzan
  Reply With Quote
Old 19th September 2006, 10:32 AM   #2
diyAudio Member
 
Join Date: May 2006
I like the 1626 but it's a different sound. I wouldn't call it 'delicate' - it's more foot-tapping and gutsy. You won't get much output from it either. I used it as a preamp tube - loved the sound it made on rock and jazz, but it didn't get that lovely delicate treble sound on strings, cymbals etc.

I guess you have to stay with DH tubes. But you have some tetrodes/pentodes you can strap as triodes. I bought a few 1624 to try out like this, and they were not expensive. The 2E22 works nicely but that's closer to a 300b and not too cheap. There's the 46 - don't know what that sounds like in output, but it's a good driver tube. Triode strapping will at least give you that DHT sound.

With indirectly heated tubes, triode strapped 6V6 can sound very nice. And another tube I currently use in the output of my amps is the 6AH4. Now that's a nice sound on a budget - very nice in fact. Needs to be run at higher B+ voltages to get the best out of it, and it's rated at 500v. I run mine around 390v. But I'd look at a DH solution first.
  Reply With Quote
Old 19th September 2006, 04:39 PM   #3
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
You might want to try the 47 in triode connection. I have heard amplifiers using it this way, and this is about as close to a poor man's 45 that you can get. (And it's close) 47's are still pretty cheap - I have seen them for as little as $3 - $5 at the MIT hamfest recently.

I would recommend a 5K SE transformer when triode connected.
Attached Files
File Type: pdf 47.pdf (43.7 KB, 102 views)
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 19th September 2006, 07:20 PM   #4
diyAudio Member
 
Join Date: May 2006
Hi Kevin. Have you heard the 49? Forgot about that one. How does it compare with the 47? Andy
  Reply With Quote
Old 20th September 2006, 02:53 PM   #5
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Hi Andy,
Unfortunately I have not heard the 49, I have heard the 45, 46, and 47. I have lots of 45's and have only designed and built using these - I made a habit of buying them whenever and wherever when they were still relatively cheap.

I have heard both 46 and 47 based amplifiers and both were actually very good. I think the 45 wins by an edge over both of these in terms of tonal balance and resolution, but the differences were subtle enough that I would say put them in the realm of differences I hear between a pair of rca globe 245's and a pair of later sylvania st 45's.

I believe all three are capable of powers in the realm of 1.5 - 2Wrms at <5% thd. (I get 1.6W with 4.5% out of my 45 amplifier)
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
poor man reciever v1d9uy Solid State 4 6th January 2006 02:28 PM
Is PSE is a poor relation? dhaen Tubes / Valves 5 30th December 2002 05:21 PM
(Poor) Box design AvoidTheLloyd Multi-Way 4 31st December 2001 03:39 PM


New To Site? Need Help?

All times are GMT. The time now is 05:39 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2