Search found 1045 matches

by ChuckG
Tue Jun 30, 2020 10:46 pm
Forum: AM Radio
Topic: FIM-21/ 41 Repairs
Replies: 9
Views: 431

Re: FIM-21/ 41 Repairs

Deep Thought wrote:
Tue Jun 30, 2020 3:06 pm

I thought Bob had shut down due to complications following his motorcycle accident. Is Mooretronix back up and running?
I think he's been out of business for over a year now.
by ChuckG
Mon Jun 29, 2020 10:29 pm
Forum: AM Radio
Topic: FIM-21/ 41 Repairs
Replies: 9
Views: 431

Re: FIM-21/ 41 Repairs

RGORJANCE wrote:
Mon Jun 29, 2020 12:17 pm
Having a senior moment here today...............I seem to recall a calibration service in Rockford, IL that did one some years ago, but can't find it at the moment. It I can recover the name. I will post it.

Fossil

TMI Calibration Labs?
by ChuckG
Mon Jun 22, 2020 6:05 pm
Forum: STL Engineering
Topic: Marti SRPT-30 frequency change
Replies: 4
Views: 305

Re: Marti SRPT-30 frequency change

TPT wrote:
Mon Jun 22, 2020 6:33 am
Bohn referred me to BE, not equipped to handle the synthesizer models.

Good to know. Guessing they can't get the serial info either lol.
by ChuckG
Mon Jun 22, 2020 6:03 pm
Forum: FM Radio
Topic: Exciter shopping
Replies: 15
Views: 1149

Re: Exciter shopping

I just installed another Bext 30 watt exciter. They can be had for about $1,500 and they just work. They're made by RVR. The STL's are also good, but you do need to filter the incoming AC and add some protection on the Rf output. They have neither and one or the other being wide open is the usual ca...
by ChuckG
Sun Jun 21, 2020 9:40 pm
Forum: STL Engineering
Topic: Marti SRPT-30 frequency change
Replies: 4
Views: 305

Re: Marti SRPT-30 frequency change

Bohn Broadcast does a nice job with those too. I've not ever gotten the frequency programming info out of BE.
by ChuckG
Tue Jun 09, 2020 7:35 pm
Forum: FM Radio
Topic: Harris FM 20 K pro and con views
Replies: 16
Views: 865

Re: Harris FM 20 K pro and con views

Replace the factory IPA and exciter with something better, That would eliminate many of the issues retuning the box. It also costs you the APC and VSWR Foldback functions if I'm not mistaken, as they rely on an attenuator in the IPA splitter. Thing is, you know what you're doing and have proper tes...
by ChuckG
Sat Jun 06, 2020 12:33 am
Forum: FM Radio
Topic: Harris FM 20 K pro and con views
Replies: 16
Views: 865

Re: Harris FM 20 K pro and con views

alleo wrote:
Thu Jun 04, 2020 9:45 am
I going to re tune our QEI 10,000
Run the Gates instead. Retuning that QEI is a nightmare you do not want to unleash.
by ChuckG
Wed May 13, 2020 9:45 pm
Forum: Ask the Engineers
Topic: Belar FMS-2 Meters
Replies: 16
Views: 870

Re: Belar FMS-2

alleo wrote:
Sun May 10, 2020 9:44 am
I have an FMM 1 so I would like to own a mate for stereo would you like to sell this ,how much ?
I have several Belar sets in storage. What do you need?
by ChuckG
Wed May 13, 2020 9:42 pm
Forum: AM Radio
Topic: Wanted Gates BC-1T or equivalent
Replies: 9
Views: 932

Re: Wanted Gates BC-1T or equivalent

I'd set your sights higher and get a Collins 20-V, 20-V2, or 20-V3, and have a much better built, better modulating tube transmitter. Parts were available far longer, and support was. Now, that's a standby transmitter. I suspect those of us who have one aren't interested in selling it lol. One of m...
by ChuckG
Mon May 04, 2020 10:05 pm
Forum: AM Radio
Topic: Wanted Gates BC-1T or equivalent
Replies: 9
Views: 932

Re: Wanted Gates BC-1T or equivalent

I know a couple of BC1T's still putting in daily service as main transmitters. At this point it's like maintaining a classic car, you know parts will fail from age. But those that do are common and easily replaced. The biggest problem with any of these rigs is finding decent tubes. They're all Chine...
by ChuckG
Tue Apr 28, 2020 5:51 pm
Forum: FM Radio
Topic: Digit or Digit-CD full manuals
Replies: 28
Views: 1270

Re: Digit or Digit-CD full manuals

I do not know if this applies to the Digit, but I had an RVR exciter in the shop here not that long ago that kept tripping the RF mute even though there was nothing connected to it. Turns out there was a small bypass cap to ground on the input that had flaked out. Might check that circuit for someth...
by ChuckG
Sun Apr 26, 2020 10:35 pm
Forum: FM Radio
Topic: Suggestions for FM Tuner
Replies: 7
Views: 398

Re: Suggestions for FM Tuner

An old mono FM radio is pretty easily converted to "composite out" since they usually only have a rudimentary RC de-emphasis filter on the output which is readily bypassed. Those probably won't fit into one rack unit though. I modified several of the old Dayton receivers to do just that, to feed tr...
by ChuckG
Mon Apr 20, 2020 10:07 pm
Forum: FM Radio
Topic: Digit or Digit-CD full manuals
Replies: 28
Views: 1270

Re: Digit or Digit-CD full manuals

What is the exciter doing, dropping into mute periodically?
I've had other Harris exciters do that if the ZIF connectors haven't been exercised in years. Not sure the Digit uses those anymore.
by ChuckG
Sun Apr 19, 2020 2:00 am
Forum: FM Radio
Topic: Digit or Digit-CD full manuals
Replies: 28
Views: 1270

Re: Digit or Digit-CD full manuals

kcbooboo wrote:
Sat Apr 18, 2020 4:15 am
Thanks. I'll let you all know what I find. I'm guessing electrolytic caps to start with, considering the probable age of the unit.

Bob M.

Got a whistle? They were good at that when the caps started to go
by ChuckG
Sun Apr 19, 2020 1:59 am
Forum: FM Radio
Topic: OMB Exciter EM 50
Replies: 10
Views: 576

Re: OMB Exciter EM 50

musiconradio.com wrote:
Sat Apr 18, 2020 10:10 am
Does the other numers and letters matter?

Thanks.
There is a BLF246B that is a different case style (screw tabs) . That's the only difference I know of.
Can you check for RF drive going into the PA amp?