Hard data on HP928 - 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
Thread Tools Search this Thread
Old 5th January 2015, 09:28 PM   #1
Elvee is offline Elvee  Belgium
diyAudio Member
Elvee's Avatar
Join Date: Sep 2006
Default Hard data on HP928

Hi there,

Does someone have (quantitative, numerical) data about the HP928 flux probes?

I salvaged a number of probes and one complete unit some years ago, and I am thinking of rebuilding a solid state instrument completely compatible with the probes.

Apart from fun, I do that for two reasons: a) the HP428 will predictably fail some day and I am not sure I will invest effort and obsolete parts into repairing it, and b) using semiconductors, it will be relatively easy to outperform the original version, in a more compact and digital version, with a fast tracking output, etc.

But to do that, I need engineering data about the saturation current of the 20KHz excitation, transduction factor, etc.
Of course, I can (painstakingly) measure and reverse engineer all of that, but it occurs to me that someone must have had the same idea, and if the data is available, I'd be quite happy to reuse it....
. .Circlophone your life !!!! . .
♫♪ My little cheap Circlophone© ♫♪

Last edited by Elvee; 5th January 2015 at 09:31 PM.
  Reply With Quote


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
What is the difference between a solid state hard drive and a regular hard drive? Sebastianebilly Everything Else 12 19th February 2013 02:49 PM
original transistor data bank-useful data federico moreno Solid State 17 9th April 2011 05:19 AM
How hard is it ? DIFORCE Solid State 5 31st August 2010 07:50 PM
How hard can it be? seth556 Chip Amps 32 10th November 2007 02:38 PM
Finding driver data the hard way. Luckyme Multi-Way 3 10th March 2004 01:53 PM

New To Site? Need Help?

All times are GMT. The time now is 03:30 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright ©1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2