JE Labs Darling 1626 Build

marantzfan

Administrator
Staff member
Went to the lumber store yesterday and picked up a board for the base.

I went in intent on getting a piece of Goncalo Alves but they didn’t have anything in anywhere near the size (thickness)I wanted.

Thought about Padauk as it was on sale, but again nothing in the right size.

Then, near the cutoff pile was a stack of Sapele 6/4 on deep discount. Most of it looked ok but not very exciting grain patterns...till I found this one!


E4B503EB-3898-4F5C-BADC-731525615C6D.jpeg250A49F1-379D-4426-A892-4C4EF1F88262.jpeg
 

opa1

Moderator
Staff member
Looking really nice! Good find on the aluminum plate. I'll have to check that out.
 

Fran604g

Just Call Me Junior
One of my favorites! I'm fortunate enough to own a very rare, and unique antique talking machine which was constructed using a beautiful Sapele veneer. The cabinet was manufactured for the Edison Phonograph Works in the mid teens of the last century, but sold off when the contracted co. (likely the Jamestown Mantel Co. of Jamestown, NY) was faced with economic troubles when the Edison co. canceled their massive order for their Sheraton "Inlaid" Phonograph model. Someone apparently purchased some of the excess cabinet stock, and outfitted some very few with generic late-teens motors, tonearms and wooden horns.

Only 2 or 3 have been documented.

Sorry for pirating your post, I look forward to seeing your finished amp. 😊
20191127_120900.jpg
 

marantzfan

Administrator
Staff member
Probably a silly question, but I’ll ask it anyhow.
I’m going to add a headphone jack, so will need volume control. However, when run as a speaker amplifier, it will be behind a preamp and i’d rather not have the volume control in circuit.

So:

1.Can anyone recommend a good quality headphone jack.

2. Is it possible to put a volume control just ahead of the headphone out, rather than at the input of the circuit? I can’t imagine why not, but figured its worth asking.

3.What is the best value for a the volume control if used only for headphones; 100k, 50k,etc? Recommendations welcome here as well.
 

marantzfan

Administrator
Staff member
For chassis mount Neutrik has a few nice options (black or silver chassis mount, gold or silver plated contacts) assuming you'd want 1/4":

NJ3FP6C-B 1/4in TRS Chassis Mount

View attachment 18310

Switchcraft and maybe Canare among others also make something similar, including non-locking versions.
Ordered in one of these Neutrik locking 1/4” jacks. Thanks @MikeyFresh for the tip!

I am thinking about a 10k pot for volume control...any problem with putting it right in front of the headphone out rather than at line in?
 
Ordered in one of these Neutrik locking 1/4” jacks. Thanks @MikeyFresh for the tip!

I am thinking about a 10k pot for volume control...any problem with putting it right in front of the headphone out rather than at line in?
Fwiw i wouldnt use the locking one, once i pulled a whole amp off its shelf when answering tbe phone when i was a bit hungover, the lock is quite secure!

I now use a 4pin xlr connector and have my headphones terminated that way, i think it sounds better too.
 

paulbottlehead

Active Member
2. Is it possible to put a volume control just ahead of the headphone out, rather than at the input of the circuit? I can’t imagine why not, but figured its worth asking.
This will create a ton of problems. You'll either have variable output impedance because the pot value is too high, or you could go really low and end up loading down the amp a bunch. A pot is not what you want, you'll want a proper L-pad to avoid all these issues.
3.What is the best value for a the volume control if used only for headphones; 100k, 50k,etc? Recommendations welcome here as well.
An 8 ohm L-pad!
 

Redboy

Knobophobe
Anthony, I suppose you could put your volume control on the input end and add a switch to bypass the thing when you wanted to.
 

marantzfan

Administrator
Staff member
This will create a ton of problems. You'll either have variable output impedance because the pot value is too high, or you could go really low and end up loading down the amp a bunch. A pot is not what you want, you'll want a proper L-pad to avoid all these issues.

An 8 ohm L-pad!
Any old 8 ohm L-Pad will do or is there one you'd recommend?
 

paulbottlehead

Active Member
Those are autoformers, which can replace an L-pad, but is functionally a bit different. I wouldn't recommend them in this particular application, as extra measures will have to be taken to switch them out when they aren't in use.
 
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