Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

RCA R-8 Chassis Rebuild
#8

(07-16-2016, 04:28 AM)palegreenthumb Wrote:  Wow Russ, hard to believe that's the same radio!

What's your take on casting 2W resistors into dogbone molds? Are they still able to dissipate 2W, or are they derated a bit?

I have been doing this for years now. I have only had one get hot enough to damage the molded material and it was the result of another failure. The idea is that you replace a 1/2w with a 2W or larger to better dissipate any heating, most of which leaves by way of the leads anyway.

But, yes. I would not run them at 2w. I have used 3.8w wire-wound when I thought heat would be a problem. This increases the cost by about 10X. These resistors (the ww) are the same size as a 2w metal (blue) so are sized to cast into a 1/2w dogbone or larger.

"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/


Messages In This Thread
RCA R-8 Chassis Rebuild - by Phlogiston - 07-15-2016, 10:48 AM
RE: RCA R-8 Chassis Rebuild - by KCMike - 07-15-2016, 12:16 PM
RE: RCA R-8 Chassis Rebuild - by Eliot Ness - 07-15-2016, 03:17 PM
RE: RCA R-8 Chassis Rebuild - by klondike98 - 07-15-2016, 07:05 PM
RE: RCA R-8 Chassis Rebuild - by Paul Philco322 - 07-15-2016, 09:27 PM
RE: RCA R-8 Chassis Rebuild - by Arran - 07-16-2016, 04:22 AM
RE: RCA R-8 Chassis Rebuild - by Phlogiston - 07-16-2016, 11:03 AM
RE: RCA R-8 Chassis Rebuild - by palegreenthumb - 07-16-2016, 04:28 AM
RE: RCA R-8 Chassis Rebuild - by Phlogiston - 07-16-2016, 10:57 AM
RE: RCA R-8 Chassis Rebuild - by Arran - 07-18-2016, 03:13 AM
RE: RCA R-8 Chassis Rebuild - by Phlogiston - 07-18-2016, 11:01 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco model 38 code 121 not receiving signal.
So one last question before I finish this radio. Regarding the speaker and output transformer. I salvaged the original o...Stormlord5500 — 09:31 AM
462ron
It’s on the bottom of the homepage of our Philcoradio.com homepage! Ron462ron — 07:20 AM
Model 70 Cabinet Trim
Steve might have some trim left. Not sure he is making anything.morzh — 06:12 AM
Model 70 Cabinet Trim
Hello musar, First all welcome to the forum and yes that is true that steve stopped making trim . Sincerely Richar...radiorich — 12:13 AM
Model 70 Cabinet Trim
I have recently come into possession of a Model 70.  The trim around the base needs to be replaced.  If this were years ...musar — 12:07 AM
philcorepairbench.com - shadow-meter
Anyone know of a way to recover these files from the repair bench? Thanks. fenbach — 11:16 PM
Philco model 38 code 121 not receiving signal.
That's true. Of course If I were to get a vtvm I'd probably have to sink money in to it to get it working right. Probabl...Stormlord5500 — 08:44 PM
Philco model 38 code 121 not receiving signal.
A DMM is good enough. One rarely has to measure indictance, but if you do, short of getting a serious LCR meter (I hav...morzh — 07:35 PM
Testing a speaker and output transformer Trutone A2-G
You guy's are right on. I found a broken wire on the speaker plug that I replaced and all is well now. Have better volu...murf — 03:43 PM
Philco model 38 code 121 not receiving signal.
I need to get a vtvm. I think that little component tester is just more accurate. Plus it shows the inductance which is ...Stormlord5500 — 03:07 PM

[-]
Who's Online
There are currently no members online.

>