An "Omage" to Harvey Gerst - D130 Question
It certainly is an honor to have my first query answered by the big man himself, Wow! Thanks Harv.
I have another question: I want to use a d130 to replace the two 12 Jensens in my 1965 silvertone 1484 piggy back amp. (It has two 6L6's in a push pull circuit, but I don't know how many ohms the amp is looking for) I don't know if I should use a 16 ohm or a 8 ohm speaker. The problem is that the amp is too loud for my requirements so i was thinking of using a 16 OHM speaker to soak up some of the power. I read some other missives about the cab size and sound deadening material which I will also incorporate but I still need to get the amp up to "3" or "4 " to get the full amp character.
The D130 might play louder than the Jensens
Quote:
Originally Posted by
jackrhein
It certainly is an honor to have my first query answered by the big man himself, Wow! Thanks Harv.
I have another question: I want to use a d130 to replace the two 12 Jensens in my 1965 silvertone 1484 piggy back amp. (It has two 6L6's in a push pull circuit, but I don't know how many ohms the amp is looking for) I don't know if I should use a 16 ohm or a 8 ohm speaker. The problem is that the amp is too loud for my requirements so i was thinking of using a 16 OHM speaker to soak up some of the power. I read some other missives about the cab size and sound deadening material which I will also incorporate but I still need to get the amp up to "3" or "4 " to get the full amp character.
Most guitar speakers have a sensitivity rating of 92~95db. Lets say the Jensen's are 94db for one speaker, two speakers will give 97 db. The sensitivity for a D130 is 101db, so the amp will play louder with the D130.
I suggest that you get a 100W 8 Ohm L-pad connect this between the amp and the speakers. The amp will see 8 Ohms and you can turn down the speakers to a lower level. If you want to use a D130 to get better over all sound GO FOR IT!!!:) John
1 Attachment(s)
Silvertone 1484 Schematic
Okay...I found a schematic for the 1484. It certainly doesn't produce 100 watts (so no problem there) with only 2 6L6GC's and there is no overall loop feedback from the secondary. As well there is only one output tap on the transformer...I'd go with he 8 ohm D130 and input level attenuators.