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

Hoffman MW601
#4

Thanks for posting the schematic.

Its a AA6 set with RF stage with slug tuning on the IFs. Did not see a mention of the IF frequency but normally these are 455 KHz.

1) Fully close the gang tuning cap with full volume.
2) Inject IF signal at pin 7 of 12BE6 with enough strength to hear a tone.
3) Adjust slugs on T2 and T1 in that order for loudest tone. Reduce signal level on generator as needed to still hear the tone.
4) Next the RF front end. Check position of dial pointer across dial for full range. Go to 1500 on dial. Set generator to 1500 KHz and place the RF cable near the antenna to receive the signal.
5) Adjust oscillator trimmer C6 on ganged tuning cap for max tone.
6) Adjust adjust antenna trimmer C2 on ganged tuning cap for max tone.
7) For RF stage, adjust C4 trimmer on ganged tuning for max tone.
7a) Move dial to 600 KHz, adjust L2 slug of RF amp for max signal.


Messages In This Thread
Hoffman MW601 - by Micro9 - 06-30-2012, 10:42 PM
RE: Hoffman MW601 - by codefox1 - 07-01-2012, 11:58 AM
RE: Hoffman MW601 - by Micro9 - 07-01-2012, 09:10 PM
RE: Hoffman MW601 - by rghines1 - 07-02-2012, 10:44 AM
RE: Hoffman MW601 - by Micro9 - 07-03-2012, 11:19 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
With regard to the speaker, unless the cone is so brittle that it crumbles as soon as you touch it I would try to repair...Arran — 04:07 AM
Philco 42-345 Restoration/Repair
That silver can capacitor is an aluminum electrolytic. You should replace it with an aluminum electrolytic with the valu...RodB — 11:46 PM
Philco 42-345 Restoration/Repair
Thank you Rodb and Gary for helping with clarification on these capacitors. Other than the Tiny 630volt one I'm not sure...osanders0311 — 10:17 PM
1949 Motorola 5A9M
Hello All; I found the CMB41L down in the basement, it is definitely a 1950-51 model, the capacitors have date codes ...Arran — 07:48 PM
Philco 42-345 Restoration/Repair
Hi, all the caps I order, other than the electrolytics, are of the 630V rating. No worries on it being too high, and no ...gary rabbitt — 05:46 PM
Philco 42-345 Restoration/Repair
Hi, there's a lot to consider when designing these circuits so you shouldn't have a lot of concern when replacing caps. ...RodB — 02:03 PM
Philco 42-345 Restoration/Repair
I have ordered and received new caps for this radio and hope I've ordered the correct ones. I tried matching them to the...osanders0311 — 11:35 AM
Philco newbie with P-1891-WA console questions
Hello Jeff , Far as the Electrolytic capacitors go here is a list of parts. that will work . I like using Nichicon and...radiorich — 09:50 PM
Philco newbie with P-1891-WA console questions
Well, I've been stumped at trying to get the first of 11 electrolytic capacitors. I got a schematic and have a list of t...Jeffcon — 07:54 PM
Model 80 Antenna Issue?
Thanks Gary and Rod.  I also found an article in the Philco Repair Bench under Service Hints and Tips, about installi...Hamilton — 12:32 PM

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

>