Alexander Posted February 4, 2018 Share Posted February 4, 2018 I have a pair of unmarked autotransformer's and a set of known T7's. The T7's measure - 6.36mH/35.95mH .19ohms/.52ohm and the unmarked - 7.45mH/42.69mH .18ohm/.67ohm I thought I saw a table somewhere but can't seem to find it. Any links or tell me what this unknown autotransformer's are? Quote Link to comment Share on other sites More sharing options...
efzauner Posted February 5, 2018 Share Posted February 5, 2018 You may have better luck if you measure the output voltage at the tap(s) Bob Crites has a cross ref table with the attenuations http://www.critesspeakers.com/autotransformers.html There is a spec sheet for the T2A under the crossovers sticky.. if you scroll down a bit on this thread. The sheet has db vs voltage for each tap. Hope this helps. Quote Link to comment Share on other sites More sharing options...
Alexander Posted February 8, 2018 Author Share Posted February 8, 2018 On 2/5/2018 at 8:24 AM, efzauner said: You may have better luck if you measure the output voltage at the tap(s) Bob Crites has a cross ref table with the attenuations http://www.critesspeakers.com/autotransformers.html There is a spec sheet for the T2A under the crossovers sticky.. if you scroll down a bit on this thread. The sheet has db vs voltage for each tap. Hope this helps. Thanks efzauner , every little bit helps, all I need know is an A/C RMS meter and figure out how to use the generator in the DATS software. Or might there be a formula to do the conversion out there? Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted February 8, 2018 Share Posted February 8, 2018 On 2/5/2018 at 8:24 AM, efzauner said: You may have better luck if you measure the output voltage at the tap(s) Bob Crites has a cross ref table with the attenuations http://www.critesspeakers.com/autotransformers.html There is a spec sheet for the T2A under the crossovers sticky.. if you scroll down a bit on this thread. The sheet has db vs voltage for each tap. Hope this helps. The link you provided above for Crites is giving me an error page, and what looks like a certificate problem. @BEC Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted February 8, 2018 Share Posted February 8, 2018 2 minutes ago, jimjimbo said: The link you provided above for Crites is giving me an error page, and what looks like a certificate problem. He's been having issues with his site lately. Quote Link to comment Share on other sites More sharing options...
efzauner Posted February 9, 2018 Share Posted February 9, 2018 You could use any of the many PC softwares that have an audio generator and output that to your amp. Most modern DMMs will read AC RMS to at least the 1Khz range. You dont even need "true rms" because you are measuring sinewaves but I digress.. Quote Link to comment Share on other sites More sharing options...
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