Hammarlund hq 100 choke info
 

Gentlemen,
How critical is the resistance and henry rating on a filter choke?
I have one for the above gen. coverage rec. rated at 500 ohms 13 henrys
and 65 ma.that is open.
Second question can I sub. a 500 ohm resister (high wattage) even if
just to continue checking out the unit?
Would be interested in buying a part from a part out radio if any available.
Thanks for any input
Gary WB3DSJ
Ps. tried antique group but no response

Second question can I sub. a 500 ohm resister (high wattage) even if
just to continue checking out the unit?

Yes, but watch the power rating.

hamrc wrote:
Gentlemen,
How critical is the resistance and henry rating on a filter choke?
I have one for the above gen. coverage rec. rated at 500 ohms 13 henrys
and 65 ma.that is open.

As long as you are in the ballpark. You can go higher on the current.

Second question can I sub. a 500 ohm resister (high wattage) even if
just to continue checking out the unit?

Yes, although it may be hummy. This is often done to replace speaker
field coil chokes. You may need to go up a bit on the filter cap values.

Would be interested in buying a part from a part out radio if any available.

Check http://www.oldradioparts.com


-Bill

hamrc wrote:
How critical is the resistance and henry rating on a filter choke?
I have one for the above gen. coverage rec. rated at 500 ohms 13 henrys
and 65 ma.that is open.
Second question can I sub. a 500 ohm resister (high wattage) even if
just to continue checking out the unit?

It won't hurt it, but the hum level will be so high it won't be too easy
to do any checking out.

Would be interested in buying a part from a part out radio if any available.

You can just rewind the old one. Doing inductors yourself is easy. Lay is
not critical and you can just wind them on until the size of the winding is
right. It's not like doing a transformer. Peter Dahl will rebuild the old
one, and they'll do a better job than you or I could, but you don't need to
pay money for that good a job.

Even your local motor rewinding place will probably do it.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Thanks for all the input.
Will let you know how it works out.
Gary