Blackheart amp moding question

SaberNub · 7th September 2010, 01:18 PM

I have a BH15 112. All the modes I see are for the BH5. But they seem to change over to the 15 with a few changes. Both the scematics and modes are here Rowbinet.

I was wondering if the wires from the pt that dead end on the board "yellow wires". On the the BH5 they are 5v but on the BH15 they are 6.3v would the same tube be used if I wanted to install a tube rectifier?

SaberNub · 8th September 2010, 05:26 PM

Am I kicking a dead horse?

leadbelly · 8th September 2010, 05:45 PM

Quote:

Originally Posted by SaberNub

I was wondering if the wires from the pt that dead end on the board "yellow wires". On the the BH5 they are 5v but on the BH15 they are 6.3v would the same tube be used if I wanted to install a tube rectifier?

Not quite, on the BH5 schematic the unused PT winding is a 5V and on the BH15 schematic the unused winding is 6V. My guess is that this is most likely a typo, since 5V and 6.3V windings make more sense than 6.0V and 6.3V windings. My advice would be to measure the voltage with a DMM. If it is 5V, then yes you would use a 5V tube rectifier, although not necessarily the same one as a BH5 since your current draw is essentially doubled.

SaberNub · 10th September 2010, 10:46 PM

The meter from wire to wire one direction 0.0 V the other direction 6.41V so what tube would I be able to use?

The reason I want to go to a tube in stead of SS is for sag. if that helps any.

7th September 2010, 01:18 PM	#1
SaberNub diyAudio Member Join Date: Sep 2010	Blackheart amp moding question I have a BH15 112. All the modes I see are for the BH5. But they seem to change over to the 15 with a few changes. Both the scematics and modes are here Rowbinet. I was wondering if the wires from the pt that dead end on the board "yellow wires". On the the BH5 they are 5v but on the BH15 they are 6.3v would the same tube be used if I wanted to install a tube rectifier?

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Modifying Blackheart BH5H for more gain	pjpoes	Instruments and Amps	15	19th January 2010 03:48 AM
Blackheart 5 watt	Redfoxfur	Tubes / Valves	7	27th March 2008 09:44 AM
Wanted, vintage mc Kiseki blackheart or Agate,lapis,	movingcoilguy	Swap Meet	3	1st November 2007 01:06 PM
Moding Car Amp	Superblunt	Car Audio	1	23rd April 2005 06:38 PM
Is it worth moding?	SteveG	Digital Source	14	15th March 2002 07:08 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

8th September 2010, 05:26 PM	#2
SaberNub diyAudio Member Join Date: Sep 2010	Am I kicking a dead horse?

10th September 2010, 10:46 PM	#4
SaberNub diyAudio Member Join Date: Sep 2010	The meter from wire to wire one direction 0.0 V the other direction 6.41V so what tube would I be able to use? The reason I want to go to a tube in stead of SS is for sag. if that helps any.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)