[Muffinhead]

Easy way to check electrical continuity is to touch one lead of your meter to the soldered joint and the other to the next connection - for example, to the solder point underneath the two crossed leads in your photo.

There are two issues here:
1) is there a good electrical connection
2) is the joint mechanically sound. For the latter, it would be nice to glue the lifted pad back down on the circuit board, if possible.

I dunno where the pad went. Am I screwed?

 

[JimL11]

I dunno where the pad went. Am I screwed?

Um, OK. As long as the solder is well connected to the trace you should be OK.

 

[jgazal]

SR-L300 Limited and SRM-353XBK

Is the SR-L300 sealed or ported?

Edit: ported.

 

[Muffinhead]

This is a picture of the t0220 insulator and washer. The insulator (mica,I believe) looks different than the one shown in the pictures,so I'm wondering if it's OK and won't cause a problem with the heat sink.

 

[JimL11]

This is a picture of the t0220 insulator and washer. The insulator (mica,I believe) looks different than the one shown in the pictures,so I'm wondering if it's OK and won't cause a problem with the heat sink.

NO! The mica insulator is not a high voltage insulator. You MUST use HV insulators, either Thermalloy 4169G or 4170G, along with non-conductive thermal paste between all surfaces. You should also use Aavid 7721-7PPSG shoulder washers to be sure that the screw used to attach the transistor to the heatsink does not contact the heatsink. Remember you are dealing with upwards of 300 volts - electricity is not forgiving.

 

[Muffinhead]

NO! The mica insulator is not a high voltage insulator. You MUST use HV insulators, either Thermalloy 4169G or 4170G, along with non-conductive thermal paste between all surfaces. You should also use Aavid 7721-7PPSG shoulder washers to be sure that the screw used to attach the transistor to the heatsink does not contact the heatsink. Remember you are dealing with upwards of 300 volts - electricity is not forgiving.

I also got silicone grease...is this ok to apply to the heat sink or should I get a different kind of thermal paste?

 

[JimL11]

You want to use something specifically sold as non-conductive thermal grease or paste.

 

[ahmedie]

SR-L300 Limited and SRM-353XBK





Is the SR-L300 sealed or ported?

Edit: ported.

OMG THIS SR-300 IS USING THE 009 DRIVER TECHNOLOGY !! I bet they sound similar to L700 which is hug discount !!

 

[jgazal]

I believe it is the same stator. But I don’t know if the diaphragm is made of the same material, thickness or has the same tension applied to. Well, perhaps same gap and coating... Too many variables. Curious to see reviews.

 

[rpeebles]

SR-L300 Limited and SRM-353XBK





Is the SR-L300 sealed or ported?

Edit: ported.

Interesting !....who is selling this and at what price ? Thanks

 

[ToroFiestaSol]

Gotta pay attention to the Fujiya Avic festivals this year!

 

[wuwhere]

Very curious too on SR-L300 Limited compared to 009.

 

[VandyMan]

I notice that it has the exact same specifications as the regular L300 except it weighs a bit more. The web page is very unclear in explaining what is different in the new Limited model. At least in English.

 

[jgazal]

Interesting !....who is selling this and at what price ? Thanks

I don’t know. I got it from stax tweeter. You may want to check the SR-L300 thread also.

 

[rpeebles]

Dear Igazal...Thank You !