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

Ordering from Justradios.com
Ordering from Justradios.com
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 29th June 2020, 09:30 PM   #121
duncan2 is offline duncan2  United Kingdom
diyAudio Member
 
Join Date: Mar 2013
Location: Scotland.
Looking at it that way -----well yes but I don't have the Huldra 7 circuit diagram.
  Reply With Quote
Old 29th June 2020, 10:03 PM   #122
PRR is online now PRR  United States
diyAudio Member
 
PRR's Avatar
 
Join Date: Jun 2003
Location: Maine USA
Ordering from Justradios.com
Quote:
Originally Posted by Fjellreven View Post
...why was almost every speaker made ...back in the Day 4 ohm....
It's cheap. Fewer turns. Enough Ohms that the part-Ohm of the lead-in wires does not matter. That's good when speaker is in the same box as the amplifier (very short wires).

The alternate was 15 Ohms for when wires had to run across a large room. Less line loss.

In smaller US talking-movie theaters the next step was two 15r in series for a 30 Ohm load which gives low line loss across medium large movie theaters.

8 ohms used to be the odd duck. But that happened to be a good V/I ratio for the early transistors.

You can run ANY impedance the system is designed for. There are compromises when you get way out. The speaker lead-in tinsels are say 0.4 Ohms. If you wind a 2-Ohm voice coil then 17% of your precious power is wasted in the lead-ins. (However today there ARE 2-Ohm car woofers, the good ones use an extra-heavy lead-in tinsel.) Up around 600 Ohms the coil winding wire wants to be thinner than the enamel insulation, so you use thin enamel, but moisture gets through, rots the thin copper, speakers don't last forever.
  Reply With Quote
Old 29th June 2020, 10:05 PM   #123
Fjellreven is offline Fjellreven
diyAudio Member
 
Join Date: Mar 2020
Here is the schematic

Tandberg | Hifi Manuals Free: page 2

I dont care if the FM is not hifi all i want to know is that if i use tape input if it will sound good or not.
  Reply With Quote
Old 29th June 2020, 10:08 PM   #124
PRR is online now PRR  United States
diyAudio Member
 
PRR's Avatar
 
Join Date: Jun 2003
Location: Maine USA
Ordering from Justradios.com
Quote:
Originally Posted by duncan2 View Post
I would need some convincing Astouffer .
FLAC - Wikipedia

"FLAC (Free Lossless Audio Codec) is an audio coding format for lossless compression of digital audio,
"The compressed files are always perfect, lossless representations of the original data."

If you follow the math, you can verify that output==input.

You may still "hear a difference"; this is always an option.
  Reply With Quote
Old 29th June 2020, 10:47 PM   #125
audiowize is online now audiowize  United States
diyAudio Member
 
Join Date: Aug 2005
Location: Seattle
Ordering from Justradios.com Send a message via AIM to audiowize
Quote:
Originally Posted by Fjellreven View Post

I dont care if the FM is not hifi all i want to know is that if i use tape input if it will sound good or not.
As I said, the amp has some pretty aggressive compensation to knock down high frequency response.
  Reply With Quote
Old 30th June 2020, 12:11 AM   #126
Fjellreven is offline Fjellreven
diyAudio Member
 
Join Date: Mar 2020
Quote:
Originally Posted by audiowize View Post
As I said, the amp has some pretty aggressive compensation to knock down high frequency response.
wait is he right if he is then i have to find another tandberg radio what about huldra 4 to 6.
  Reply With Quote
Old 30th June 2020, 05:12 AM   #127
duncan2 is offline duncan2  United Kingdom
diyAudio Member
 
Join Date: Mar 2013
Location: Scotland.
Look Fjellreven its a pretty upmarket circuit ---for its day as a table radio but it is not comparable to the 1970/1980,s dedicated tuner/amplifiers which could reach 15Khz .


Its down to circuit design of the time , its very good as a table radio .


In the Huldra 8 you will notice they redesigned the FM tuner .
Actually the Huldra 5 would be a better choice .
  Reply With Quote
Old 30th June 2020, 09:15 AM   #128
Fjellreven is offline Fjellreven
diyAudio Member
 
Join Date: Mar 2020
Quote:
Originally Posted by duncan2 View Post
Look Fjellreven its a pretty upmarket circuit ---for its day as a table radio but it is not comparable to the 1970/1980,s dedicated tuner/amplifiers which could reach 15Khz .


Its down to circuit design of the time , its very good as a table radio .


In the Huldra 8 you will notice they redesigned the FM tuner .
Actually the Huldra 5 would be a better choice .
Yeah i own the huldra 8 im a little bit dissapointed the huldra 7 cant keep up but oh well i guess the transistor radios tandberg made were better then their tube radios. The huldra 8 sounds Great with some 70s seas speakers like the hifi kit 30.

Also great as tabletop radio with speakers that sucks and only 5 khz on the tape input. Yeah and im serious those goodmans speakers are terrible. The regular old tandberg type 165 could beat them easily.
  Reply With Quote
Old 30th June 2020, 09:22 AM   #129
Fjellreven is offline Fjellreven
diyAudio Member
 
Join Date: Mar 2020
Also i dont expect every tube radio to be hifi its just that i expected a little bit more since its a huldra.
Can the huldra 5 reach 10 khz on the tape input.
  Reply With Quote
Old 30th June 2020, 10:47 AM   #130
Fjellreven is offline Fjellreven
diyAudio Member
 
Join Date: Mar 2020
Opps i meant seas hifi 30
Attached Images
File Type: jpg 203342-a2704151bfc08da9a56226f0fd490949.jpg (44.6 KB, 59 views)
  Reply With Quote

Reply


Ordering from Justradios.comHide 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
Justradios - Recent email problem VictoriaGuy Parts 0 26th February 2019 12:35 AM
Anyone ordering from THEL? Nisbeth Parts 0 6th April 2007 09:39 PM
Ordering a Charlize? onehotchili Class D 2 26th May 2006 06:58 PM


New To Site? Need Help?

All times are GMT. The time now is 02:38 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki