dna Posted December 23, 2021 Report Share Posted December 23, 2021 I have a pair of Model AR 5 speakers and I'd like to recap them. I was inside them summer before last but lost my list of caps and their specs, is there a reference I could look at? I tried going down the list of drawings, the file names are numbers; without a key or cross reference you have to go down the entire list to find the drawing you need. Quote Link to comment Share on other sites More sharing options...
RoyC Posted December 23, 2021 Report Share Posted December 23, 2021 The tweeter circuit cap is 4uf, the midrange is 24uf, and the woofer is 72uf. Quote Link to comment Share on other sites More sharing options...
dna Posted December 23, 2021 Author Report Share Posted December 23, 2021 Do the volts and type make a difference? Quote Link to comment Share on other sites More sharing options...
JKent Posted December 23, 2021 Report Share Posted December 23, 2021 Take a look at this. Caps should be 50vdc minimum but can be higher. Use film or npe. Many here would use film for the 4 and 24, and npe for the 72 but you can use film for all or npe for all. Film lasts forever, npe is cheaper edit: bad link please see my next post Quote Link to comment Share on other sites More sharing options...
DavidR Posted December 23, 2021 Report Share Posted December 23, 2021 50 volts AC Quote Link to comment Share on other sites More sharing options...
JKent Posted December 23, 2021 Report Share Posted December 23, 2021 Looks like my link didn’t work. Try the link in the first post here Carl wrote 50VDC minimum for the caps, not AC. Doesn’t matter. Most of the modern caps will be at least 100 vdc Quote Link to comment Share on other sites More sharing options...
DavidR Posted December 23, 2021 Report Share Posted December 23, 2021 50VDC equals approx 35VAC. All of the AR speakers I've worked on are listed in AC, but all are Teledyne/AR era. However, I have not worked on any of the older models like an AR5. It does matter as speakers run on AC current. DC is blocked by a capacitor. Quote Link to comment Share on other sites More sharing options...
RoyC Posted December 23, 2021 Report Share Posted December 23, 2021 Very few crossover caps, new or old, are labeled as "AC" or "DC". Old caps are usually just labeled as VNP. For example the AR-5 Spragues in speakers I recently repaired are labeled 24UF-50VNP and 72UF-VNP. Most modern crossover caps, even if the label is printed with a DC value, are typically labeled as xxUF-100 VNP or higher...which is sufficient for even the most demanding listeners. Once again, to avoid the inevitable confusion caused by such minutia, it is really not an issue. None of the major capacitor retailers are selling crossover capacitors with inadequate power ratings. Roy Quote Link to comment Share on other sites More sharing options...
dna Posted December 24, 2021 Author Report Share Posted December 24, 2021 15 hours ago, DavidR said: 50 volts AC On 12/22/2021 at 9:30 PM, JKent said: Take a look at this. Caps should be 50vdc minimum but can be higher. Use film or npe. Many here would use film for the 4 and 24, and npe for the 72 but you can use film for all or npe for all. Film lasts forever, npe is cheaper The link isn't good on my puter and McAffe don't like it either... Quote Link to comment Share on other sites More sharing options...
DavidR Posted December 24, 2021 Report Share Posted December 24, 2021 PM sent Quote Link to comment Share on other sites More sharing options...
JKent Posted December 24, 2021 Report Share Posted December 24, 2021 7 hours ago, dna said: The link isn't good on my puter and McAffe don't like it either... Yeah. Look 2posts down Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.