Hello, I hope I am replying in the right spot. Thank you all for the suggestions, I ended up ordering Canare L-4E6S Star Quad Mic Cable 4 conductor shielded cable on the cheap, arriving tomorrow. In the meanwhile I fired up the power supply and I measure 25VDC on each rail, is n't that too high? I am using the Talema transformer, 15v+15v. I Believe the maximum specified in the building guide is around 22VDC. Does it measure higher with no load attached to it? Thank you for any and all help
Some transformers have higher unloaded rails and higher tolerances also. Doesn´t really matter.
It could be as simple, as the transformer is specified for 115 volt, and you have 118 volts in your wall.
The 78/7915 specifies max input voltage of 35volt DC, so you´re more than good to go 😉
It could be as simple, as the transformer is specified for 115 volt, and you have 118 volts in your wall.
The 78/7915 specifies max input voltage of 35volt DC, so you´re more than good to go 😉
Thank you!!! Good to know. Are those voltage regulators? I m only familiar with gas voltage regulators that need a minimal voltage to fire up.
The "no" is in answer the post immediately above it where Patrick is asking if the quoted parts are the regulators used.
As for the higher voltage, all unregulated linear supplies will have more voltage in a no-load condition, and generally worse the smaller the transformer. Under load things will measure as expected and perform perfectly.
As for the higher voltage, all unregulated linear supplies will have more voltage in a no-load condition, and generally worse the smaller the transformer. Under load things will measure as expected and perform perfectly.
oh thanks, that is reassuring. I'll hook up he umbilical tomorrow and power it all up with a variac.
Apologies. I was attempting to answer the question asked, not check the part. I took the exact part number listed in the BoM in the build document, plugged it into Mouser, and voila - the description of the part says "voltage regulator(s)".
If that part won't / doesn't work (I don't know why it wouldn't... but it may not) and/or isn't the one in the kit, the build doc may need a revision.
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Same/same.
One difference is manufacturer.
You showed the ones from ST-micro (SGS/Thompson)
6L6 showed the ones from On-Semi.
They are functionally the same part 😉
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@ItsAllInMyHead : The STMicro regulators will work. I looked at the positive voltage regulator datasheets and the onsemi one Jim linked appears to have better regulation.
I don't know what's in the kit however as I haven't built mine yet.
Cheers,
Dennis
I don't know what's in the kit however as I haven't built mine yet.
Cheers,
Dennis
Sorry if I got this turned around with poor communication. I know the parts work.
All I was doing was answering radushka's question from post #5163. That's why I quoted a segment of their post in post #5164 and put the image below of the part (exact part number noted in the build document) along with the description of the part in the image.
Jim thought I was asking if the parts were correct / in the kit / used. I was not.
However... since he said "no" "these" and listed different parts, I was calling attention to the fact that the part I had noted was in the document. Therefore if there was a reason to not use the part currently in the document, that perhaps the document should be updated.
Apologies once again.
I should be banned from posting pre third coffee.
Thanks!
All I was doing was answering radushka's question from post #5163. That's why I quoted a segment of their post in post #5164 and put the image below of the part (exact part number noted in the build document) along with the description of the part in the image.
Jim thought I was asking if the parts were correct / in the kit / used. I was not.
However... since he said "no" "these" and listed different parts, I was calling attention to the fact that the part I had noted was in the document. Therefore if there was a reason to not use the part currently in the document, that perhaps the document should be updated.
Apologies once again.
I should be banned from posting pre third coffee.
Thanks!
I have some lme49720Ha opamps, any experience with those ? Currently its running om opa2134.
All mentioned parts are genuine.
All mentioned parts are genuine.
Thank you all for a very reactive thread. If you have experience with the male XLR connector (4 pin) from MOUSER....... The one that plugs into the back of the phono amp... It looks like it is going to be a challenge to solder the wires to its lug, as they are recessed, far inside the connector. Not a big deal, but I thought it was worth asking if I am missing something. I cannot unscrew anything, it looks like that s it. Right?
^ I've had a few more cups of coffee, so maybe my answer will be more clear than my first try with the regulator. 🙂
If you purchase this part... this specific one listed in the build document.... 🙂
4 Pin XLR male Jack Umbilical Pwr Jack 568-NC4MD-LX-B
You are correct that the male pins for connecting to the female jack (part number below) are recessed. However, you don't solder to those. You would solder your wiring to the solder cups on the "back" of the jack. They are not recessed.
Am I understanding your dilemma correctly?
Edited to add - female jack Mouser part # - 568-NC4FXX-B
Edited again to add an image... this is where you solder your wiring.
If you purchase this part... this specific one listed in the build document.... 🙂
4 Pin XLR male Jack Umbilical Pwr Jack 568-NC4MD-LX-B
You are correct that the male pins for connecting to the female jack (part number below) are recessed. However, you don't solder to those. You would solder your wiring to the solder cups on the "back" of the jack. They are not recessed.
Am I understanding your dilemma correctly?
Edited to add - female jack Mouser part # - 568-NC4FXX-B
Edited again to add an image... this is where you solder your wiring.
oh, my mistake, I am confused because of the freudian aspect of the xlr connector, i forgot that their gendre is based on their pins vs holes, regardless of which one penetrates the other 🙂 Although here we can speak of interpenetration on two levels. I guess I am talking about the female end of the umbilical. Thank you for taking the time