|
|||||||
| Home | Forums | Rules | Articles | Store | Gallery | Blogs | Register | Donations | FAQ | Calendar | Search | Today's Posts | Mark Forums Read | Search |
| Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum |
| diyAudio Sponsor | ||
|
||
 |
|
|
Thread Tools | Search this Thread |
2nd August 2005, 01:06 PM
|
#1 |
|
diyAudio Member
Join Date: Dec 2003
Location: Midwest
|
Filaments for the Aikido
I need a linestage with a gain of about 20. This naturally suggests using a 12AY7 for the first totem of the Aikido (the 12AY7 has a mu of 40). I’ll probably use the JJ ECC99 for the second totem, to get some beefy output drive (plate impedance under 2.5k).
I want to use 300V on the power supply, which means each plate will be dropping about 150V. I’m worried about the filaments. The 12AY7 is rated for 90V maximum cathode to filament voltage. Does this mean you can’t stack 12AY7 in SRPP or other arrangements because of the filament limitation? My other alternative is the 6N1P (mu of 35), which is capable of higher cathode to filament potentials. |
|
|
2nd August 2005, 01:24 PM
|
#2 |
|
diyAudio Moderator Emeritus
|
If you lift the heaters to about 80v both cathodes will be within the 90V insulation limit. ...i.e. 75V up and down relative to the cathode.
|
|
|
|
| Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
| Thread Tools | Search this Thread |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| CCS Design for DHT Filaments | dsavitsk | Tubes / Valves | 9 | 29th April 2008 06:56 PM |
| Alloys for filaments | Calvin | Tubes / Valves | 6 | 16th August 2007 12:41 PM |
| Aikido PCB and AC filaments. | G | Tubes / Valves | 6 | 30th October 2006 08:36 PM |
| DC filaments setup | mig-ru | Tubes / Valves | 23 | 22nd April 2003 11:30 AM |
| New To Site? | Need Help? |
| Page generated in 0.16642 seconds (34.72% PHP - 65.28% MySQL) with 10 queries |
