Forums :: Resources :: Features :: Photo Gallery :: Vintage Radio Shows :: Archives :: Books
Support This Site: Contributors :: Advertise


It is currently Dec Mon 17, 2018 3:32 pm


All times are UTC [ DST ]





Post New Topic Post Reply  [ 16 posts ] 
Author Message
 Post subject: Tek 214
PostPosted: Mar Mon 05, 2018 2:18 pm 
Member

Joined: Jan Thu 29, 2015 3:34 am
Posts: 55
I have a tektronix 214, when pressing the storage button I get the storage screen appearing unfortunately in non storage mode I get no Trace I have checked the rails they all seem to be where they need to be the high-voltage section not so certain about I am getting approximately 700 to800 volts negative on some of the Rails which are supposed to be more like a thousand I have changed capacitors throughout the power section and I think that I could be missing the output for the filament which I believe is -990 if anyone has any information on the scope that can give me a general Direction please do at this point I am not entirely sure what's going on other than it seems that the high-voltage section seems to be not there or my filament voltage is not there any help will be appreciated ,thanks.


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Tue 06, 2018 12:23 pm 
Member

Joined: Nov Wed 15, 2006 7:56 am
Posts: 1193
Location: germany
on bama.edebris.com is the service manual, it includes all high voltages around the CRT.
When you have the beam amplitude in storage mode the filament cannot be defect.
Remember that a CRT can also be dark when the time base is stopped and there is a continuous unblanking signal comming.
Make shure that the boards are exactly plugged in, the little gold pins between them must have contact.
Do not use the scope without batteries in good condition.
greetings
Martin


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Wed 07, 2018 4:24 am 
Member
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 909
Location: saginaw, mi USA
I agree that you must have good batteries even if powered off wall current. NiCads can be used and are preferable. I haven't fixed a 214 but have a few of the other small Tek. good fully charged batteries are a must for the scope to work.

Keith


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Wed 07, 2018 7:04 am 
Member

Joined: Jan Thu 29, 2015 3:34 am
Posts: 55
My batteries have a good charge on them , if I press storage mode the CRT lights bright so if good enough to light storage mode I am guessing should be fine for regular scope mode. My HV are in the 500 range for the -900 and -600 volt range , is there anything other than a bad cap or resistor that can have this effect on HV rail???

For a moment I though it could have been the t270 transformer that was not putting out anything to tube heater but it turns out to be just lower than it should be, time base checked threw full range but still no trace, there must be something I don't see , anyone?????


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Wed 07, 2018 9:16 am 
Member

Joined: Nov Wed 15, 2006 7:56 am
Posts: 1193
Location: germany
Waterski wrote:
I haven't fixed a 214 but have a few of the other small Tek.
Keith


good luck in collecting them. I have them all, except the 211 what I am looking to get one.

They all must be checked for destroyed copper lines on the boards done by acid from bad batteries.

greetings
Martin


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Thu 08, 2018 6:18 am 
Member

Joined: Jan Thu 29, 2015 3:34 am
Posts: 55
I found out that the issue with my 214 is the CRT , looks as if I lost the heater pin 1and 2 on CRT ,, so now I need a good CRT , if anyone has one please let me know , thanks.


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Thu 08, 2018 9:17 am 
Member

Joined: Nov Wed 15, 2006 7:56 am
Posts: 1193
Location: germany
puh.. extremly rare part, good luck
Martin


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Sat 10, 2018 6:06 am 
Member
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 909
Location: saginaw, mi USA
what is the crt number? might have one.

Keith


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Sun 11, 2018 4:52 am 
Member

Joined: Apr Thu 11, 2013 11:03 pm
Posts: 464
Location: 649 Lacy Wilkerson Rd Roxboro, NC 27574
The CRT part number is 154-0732-00. Good luck finding one. I looked for a couple years for a reasonably priced one before finally getting one from eBay.

_________________
Joel Walker


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Sun 11, 2018 6:40 am 
Member

Joined: Jan Thu 29, 2015 3:34 am
Posts: 55
Just saw the post , Keith I see someone has posted a part number already but I do not know if it's correct or not . Anyway I don't think the CRT is going to be hard to recognize because it has two plugs connected to it the other scopes similar seem to not have the two extra cables,which are for the storage .please let me know if you have one , I happen to have a few CRT but not that , scope.


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Sun 11, 2018 3:31 pm 
Member

Joined: Apr Thu 11, 2013 11:03 pm
Posts: 464
Location: 649 Lacy Wilkerson Rd Roxboro, NC 27574
If you will look at page 8-11 in your manual you will find the CRT part number of 154-0732-00 for late serial numbers and 154-0695- 00 for early serial numbers. They will both work for your scope. The manual I used is the one at Tekwiki. Don't know if the one at BAMA is the same release or not. My original CRT also had an open filament. The original owner was Carolina Power & Light. It was working and they sent it off to be calibrated. When it was returned it didn't work so I got it for scrap value. It took so long for me to get a new CRT that when I did several of the tantalum capacitors had shorted. I haven't had the time to finish it.

_________________
Joel Walker


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Sun 11, 2018 8:55 pm 
Member

Joined: Jan Thu 29, 2015 3:34 am
Posts: 55
Thanks for the info, I guess they are really hard to come by based on that story, I was hoping for alot faster result. You should go ahead and fix the old scope being that you went threw all that trouble, I wish that was my issue now , hopefully someone else has one they can part with,thanks.


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Tue 13, 2018 1:40 am 
Member
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 909
Location: saginaw, mi USA
I see eBay has a 214 up for bids. Working and starting at $125. Might be cheaper than a CRT alone would be. And another as is not working with the carrying case at $155.

Keith


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Tue 13, 2018 4:34 pm 
Member

Joined: Jan Thu 29, 2015 3:34 am
Posts: 55
Thanks for the info ,I did see those , but I already spent for the one I have so didn't want to go buying another scope just for CRT. Unless the scope is really cheap then I would buy another , dose not make sense to spend alot when it's just being collected for a keep sake , not really being used as a everything day scope, just to have because it's a cool gadget.


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Wed 14, 2018 9:13 am 
Member

Joined: Nov Wed 15, 2006 7:56 am
Posts: 1193
Location: germany
a hard working scope is the little 213 bec. it have a internal onscreen DMM also.
I use that oftenly for searching problems in audio mixer consoles.
greetings
Martin


Top
 Profile  
 
 Post subject: Re: Tek 214
PostPosted: Mar Sat 17, 2018 2:47 pm 
Member

Joined: Jan Thu 29, 2015 3:34 am
Posts: 55
I happen to have that scope as well fortunately I got that one to work , just the CRT issue with my214 , still on the hunt for a good CRT


Top
 Profile  
 
Post New Topic Post Reply  [ 16 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: Google Adsense [Bot], WoodchuckTN and 3 guests



Search for:
Jump to:  
























Privacy Policy :: Powered by phpBB