hello was talking to you folks last night about the radiola 17- (the 5 stage resistor). Well i brought my multitester back and got a less expensive 1 that was more accurate. The values for the resistor that you gave me was 1690-205-2140-3750-410. I found 2 hidden resistors , all taped up and tucked up inside the chasis. The new values i got were 1759-OL-OL-125 (hidden 1 )-722. The highest value 10 watt resistor i could find were 500 ohms on that sight you directed me 2. Is it possible 2 gang these together to get the correct values? Thank you Eric G

Yes, you can do this--put two resistors in series to obtain another value. It is odd that your old resistors have drifted higher in value. Are these wire wound? Check for corrosion in the wire. Usually wire wound resistors don't drift in value.

If you have broken segments in your original resistor, you may leave it in place and simply bridge across the broken segments with new resistors of the same values as the old segments.

Thomas

:Yes, you can do this--put two resistors in series to obtain another value. It is odd that your old resistors have drifted higher in value. Are these wire wound? Check for corrosion in the wire. Usually wire wound resistors don't drift in value.
:
:If you have broken segments in your original resistor, you may leave it in place and simply bridge across the broken segments with new resistors of the same values as the old segments.
:
:Thomas I wanted to ask, What if you cant match the exact values. What is acceptable. More then the original value or less?

Depends upon the circuit. If the tubes are running a bit below their maximum allowable voltage, a little less resistance in series between the rectifier and the tubes is acceptable. You can subtract between 50 and 100 ohms. However, if you do this with a lot of resistors, say 5, it is better to subtract 50. On the other hand, if the tubes are running around maximum allowable voltage, it is better to overshoot by 50 to 100 ohms. This all depends upon the circuitry. Also, with a bleeder resistor it is better in certain parts to overshoot than to undershoot. A bleeder resistor is one that goes across the power supply instead of in series with it.

I think that in your case if you over and undershoot by 50 ohms, you'll be fine...make some over by 50 and some under....try for exact matches if possible. Don't go over or under more than this. You'd have to give me the exact values you are replacing and what you want to replace them with. Then I could tell you what I really think. I think it is a good idea for others to give their opinions on this as well.....say from experience, if anyone has experience with this particular radio. Some things, like where you tap off cathode bias, must be rather critical. Too much or too little resistance can cause distortion in the audio.

The resistor you are dealing with is a combination cathode bias/bleeder resistor, so as I said before, try to stay within 50 ohms of the original value for each segment. With experience you would want to experiment with the values if exact matches weren't possible. Since you're kind of new to this, experimentation isn't practical yet.

Thomas

Hi Eric,
I believe you need to get an autoranging meter. You don't have to select a range. No more OL error codes.

Bill VA

:hello was talking to you folks last night about the radiola 17- (the 5 stage resistor). Well i brought my multitester back and got a less expensive 1 that was more accurate. The values for the resistor that you gave me was 1690-205-2140-3750-410. I found 2 hidden resistors , all taped up and tucked up inside the chasis. The new values i got were 1759-OL-OL-125 (hidden 1 )-722. The highest value 10 watt resistor i could find were 500 ohms on that sight you directed me 2. Is it possible 2 gang these together to get the correct values? Thank you Eric G

Wrong! made mistake. On my autoranging resistance is measured and the OL is open circuit. On another digital non-autoranging the number 1 is open and overange.

Bill VA

Hi Eric,
:I believe you need to get an autoranging meter. You don't have to select a range. No more OL error codes.
:
:Bill VA
:
::hello was talking to you folks last night about the radiola 17- (the 5 stage resistor). Well i brought my multitester back and got a less expensive 1 that was more accurate. The values for the resistor that you gave me was 1690-205-2140-3750-410. I found 2 hidden resistors , all taped up and tucked up inside the chasis. The new values i got were 1759-OL-OL-125 (hidden 1 )-722. The highest value 10 watt resistor i could find were 500 ohms on that sight you directed me 2. Is it possible 2 gang these together to get the correct values? Thank you Eric G

It's nice to use anolog meters. Since you can see needle movement, you have more of an idea as to what is going on. When the numbers jitter all over the place on a digital meter, things are a bit more confusing. I was at Radio Shack the other day, and I saw their anolog meter. It's only $15. ....A wise investment. This meter is rather accurate and durable, and is a pleasure to use. Sometimes Radio Shack meters have cheap "zero-ing" controls (the potentiometer you adjust to zero ohms), which can cause irratic operation after some use. This takes away from some of the pleasure of using this instrument. Still, for the price, it's an excellent piece to own.

Thomas

Hi Thomas,
Just getting back and will catch up on a few replies. Yes, I have a Radio Shack, RCA WV-98c, a VIZ, and my most used, a SANWA from a CIE course in early 70's. You're right about the jitter and getting confused. I've gotten bit a few times, my touching the test clips because didn't quite understand the reading and forgot the hookups. Too hasty sometimes. But that mostly happened with my Sears small non-autoranging meter. Which actually has always been sufficient for me. Now I got few more meters to get confused over.

Bill VA

It's nice to use anolog meters. Since you can see needle movement, you have more of an idea as to what is going on. When the numbers jitter all over the place on a digital meter, things are a bit more confusing. I was at Radio Shack the other day, and I saw their anolog meter. It's only $15. ....A wise investment. This meter is rather accurate and durable, and is a pleasure to use. Sometimes Radio Shack meters have cheap "zero-ing" controls (the potentiometer you adjust to zero ohms), which can cause irratic operation after some use. This takes away from some of the pleasure of using this instrument. Still, for the price, it's an excellent piece to own.
:
:Thomas